Don't ship .la files

[Michael Hope]

GCC installs the following libtool archive (.la) files:

./libexec/gcc/arm-linux-gnueabi/4.6.3/liblto_plugin.la
./lib/gcc/arm-linux-gnueabi/4.6.3/libgfortranbegin.la
./arm-linux-gnueabi/libc/lib/libstdc++.la
./arm-linux-gnueabi/libc/lib/libgfortran.la
./arm-linux-gnueabi/libc/lib/libsupc++.la

These have absolute paths and, according to Debian policy, shouldn't be shipped. Remove.

[Michael Hope (michaelh1)]

Affects Ken's Openembedded builds.