#1 Fix builds on x86_64 kernels

[Chris Heiser]

Building app_conference on a 64-bit 2.6 kernel results in the following linking problem:

cc -pg -shared -Xlinker -x -o app_conference.so app_conference.o conference.o member.o frame.o cli.o libspeex/preprocess.o libspeex/misc.o libspeex/smallft.o
/usr/bin/ld: app_conference.o: relocation R_X86_64_32 against `a local symbol' can not be used when making a shared object; recompile with -fPIC
app_conference.o: could not read symbols: Bad value
collect2: ld returned 1 exit status
make[2]: *** [app_conference.so] Error 1

This patch adds -fPIC as it shouldn't break any systems that don't support PIC, and will fix 64-bit systems.

[Chris Heiser]

Add -fPIC to CFLAGS to fix compilation issues on x86_64 platforms