The bug is systematic with skia_bench, I can reproduce it on snowball with and without libjpeg-turbo.

here is teh stack dump after segfault 


F/libc    ( 2189): Fatal signal 11 (SIGSEGV) at 0x20db15d4 (code=1)
I/DEBUG   ( 1476): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
I/DEBUG   ( 1476): Build fingerprint: 'snowball/snowball/snowball:4.0.1/ITL41D/eng.frq08944.20111125.113441:eng/test-keys'
I/DEBUG   ( 1476): pid: 2189, tid: 2189  >>> skia_bench <<<
I/DEBUG   ( 1476): signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 20db15d4
I/DEBUG   ( 1476):  r0 00000000  r1 00033c50  r2 00000001  r3 00000004
I/DEBUG   ( 1476):  r4 00033c50  r5 20db15d0  r6 20d7d980  r7 401064a8
I/DEBUG   ( 1476):  r8 401064a8  r9 00000004  10 0000000a  fp 00000001
I/DEBUG   ( 1476):  ip 40106474  sp be8bf868  lr 400d003c  pc 400d34ca  cpsr 80000030
I/DEBUG   ( 1476):  d0  65736d63203a3536  d1  393531203d20732e
I/DEBUG   ( 1476):  d2  000000055f397837  d3  6a2e3538515f3036
I/DEBUG   ( 1476):  d4  a2a2a2a2a2a2a2a2  d5  a2a2a2a2a2a2a2a2
I/DEBUG   ( 1476):  d6  3ce46314ccce76dc  d7  00000003a1a1a0a0
I/DEBUG   ( 1476):  d8  0000000000000000  d9  000001aa3f000000
I/DEBUG   ( 1476):  d10 000000d500000140  d11 00000000000000a0
I/DEBUG   ( 1476):  d12 0000000000000000  d13 0000000000000000
I/DEBUG   ( 1476):  d14 0000000000000000  d15 0000000000000000
I/DEBUG   ( 1476):  d16 3fece81450f1a680  d17 3def1baf9d028a1d
I/DEBUG   ( 1476):  d18 3fe0000000000000  d19 3fe00000001f1bb0
I/DEBUG   ( 1476):  d20 a3a2a1a0a0a0a1a1  d21 a3a2a1a09fa0a0a1
I/DEBUG   ( 1476):  d22 a3a2a1a09fa0a0a1  d23 a2a2a09f9f9fa0a1
I/DEBUG   ( 1476):  d24 14091414142a143c  d25 1474145a14341413
I/DEBUG   ( 1476):  d26 13fe1409141f1431  d27 1469144f14291408
I/DEBUG   ( 1476):  d28 13f714021418142a  d29 1462144814221401
I/DEBUG   ( 1476):  d30 13f213fd14131425  d31 145d1443141d13fc
I/DEBUG   ( 1476):  scr 28000010
I/DEBUG   ( 1476): 
I/DEBUG   ( 1476):          #00  pc 000154ca  /system/lib/libc.so (dlfree)
I/DEBUG   ( 1476):          #01  pc 00015ed8  /system/lib/libc.so (free)
I/DEBUG   ( 1476):          #02  pc 000009bc  /system/lib/libstdc++.so (_ZdlPvRKSt9nothrow_t)
I/DEBUG   ( 1476):          #03  pc 0000cf98  /system/bin/skia_bench
I/DEBUG   ( 1476):          #04  pc 0000dcba  /system/bin/skia_bench
I/DEBUG   ( 1476): 
I/DEBUG   ( 1476): code around pc:
I/DEBUG   ( 1476): 400d34a8 44781444 e7f54479 f003686b 2a030203 
I/DEBUG   ( 1476): 400d34b8 60bebf02 0301f023 d030606b f08042ac 
I/DEBUG   ( 1476): 400d34c8 686a81c7 f14007d1 f01281c3 f0400102 
I/DEBUG   ( 1476): 400d34d8 f8df8118 447b3414 42856998 68dad118 
I/DEBUG   ( 1476): 400d34e8 c408f8df 695a18b6 60de44fc f0464294 
I/DEBUG   ( 1476): 
I/DEBUG   ( 1476): code around lr:
I/DEBUG   ( 1476): 400d001c e2166903 1a000018 e5945000 e1a02004 
I/DEBUG   ( 1476): 400d002c e2055a02 e1a00005 e3851001 ebffed43 
I/DEBUG   ( 1476): 400d003c e3500000 13856002 1a000001 ea000009 
I/DEBUG   ( 1476): 400d004c ebfffe87 e1a01004 e1a00006 ebffed43 
I/DEBUG   ( 1476): 400d005c e1a01005 e1a02006 e3a03000 e1550000 
I/DEBUG   ( 1476): 
I/DEBUG   ( 1476): stack:
I/DEBUG   ( 1476):     be8bf828  00000088  
I/DEBUG   ( 1476):     be8bf82c  401064d0  
I/DEBUG   ( 1476):     be8bf830  401064d0  
I/DEBUG   ( 1476):     be8bf834  00000080  
I/DEBUG   ( 1476):     be8bf838  00033f00  
I/DEBUG   ( 1476):     be8bf83c  00033f68  
I/DEBUG   ( 1476):     be8bf840  000150d8  /system/bin/skia_bench
I/DEBUG   ( 1476):     be8bf844  40106474  
I/DEBUG   ( 1476):     be8bf848  be8bfac0  
I/DEBUG   ( 1476):     be8bf84c  00033c68  
I/DEBUG   ( 1476):     be8bf850  00000001  
I/DEBUG   ( 1476):     be8bf854  00000001  
I/DEBUG   ( 1476):     be8bf858  00033c68  
I/DEBUG   ( 1476):     be8bf85c  0000000a  
I/DEBUG   ( 1476):     be8bf860  df0027ad  
I/DEBUG   ( 1476):     be8bf864  00000000  
I/DEBUG   ( 1476): #00 be8bf868  be8bfac0  
I/DEBUG   ( 1476):     be8bf86c  00033c68  
I/DEBUG   ( 1476):     be8bf870  00000001  
I/DEBUG   ( 1476):     be8bf874  00000001  
I/DEBUG   ( 1476):     be8bf878  000001e0  
I/DEBUG   ( 1476):     be8bf87c  0000000a  
I/DEBUG   ( 1476):     be8bf880  0000000a  
I/DEBUG   ( 1476):     be8bf884  400d3edb  /system/lib/libc.so
I/DEBUG   ( 1476): #01 be8bf888  be8bfac0  
I/DEBUG   ( 1476):     be8bf88c  401bf9bf  /system/lib/libstdc++.so

with arm-linux-androideabi-addr2line tool we are to able to know from where segfault comes.
The command line is: 
"prebuilt/linux-x86/toolchain/arm-linux-androideabi-4.4.x/bin/arm-linux-androideabi-addr2line -C -f -e out/target/product/snowball/symbols/system/bin/skia_bench 0000cf98"
the error is located in file (:line) external/skia/bench/BenchTimer.cpp:32

it is the release of this->fGpuTimer

The error occur only at the end of skia_bench so all the performance tests are done the value could be retrieved in android log ($logcat -d)