bootstrap-gcc-precompile

[#29] Add -D_LARGEFILE64_SOURCE to CFLAGS so it compiles on i386 as well

Motivation:

We need to add -D_LARGEFILE64_SOURCE to CFLAGS so it compiles on i386 as well.

Modifications:

Add -D_LARGEFILE64_SOURCE to CLFAGS in m4 file

Result:

Now compiles on i386 as well.