minor performance improvement for platforms where -fPIC and -fpic are actually...

minor performance improvement for platforms where -fPIC and -fpic are actually different (has no effect on x86/x86-64)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@43166 65c4cc65-6c06-0410-ace0-fbb531ad65f3