RFE: Add symbols for libnspr4

[Jeff Johnson]

In trying to build kompozer as an LSB app, I'm running into the following
missing symbols from libnspr4.so at the link step of the javascript portion of
the build:

[stew@pavilion src]$ grep undefined out.log | awk '{print $5}' | sort | uniq
`PR_AtomicDecrement'
`PR_AtomicIncrement'
`PR_DestroyCondVar'
`PR_DestroyLock'
`PR_GetCurrentThread'
`PR_GetThreadPrivate'
`PR_Lock'
`PR_NewCondVar'
`PR_NewLock'
`PR_NewThreadPrivateIndex'
`PR_NotifyAllCondVar'
`PR_NotifyCondVar'
`PR_SetThreadPrivate'
`PR_Unlock'
`PR_WaitCondVar'