config/cf/bsdLib.rules: Switch -fpic to -fPIC
lib/DtXinerama/Imakefile: Use $(PICFLAGS) instead of -fpic
Several tickets have been opened by users encountering the low 8KiB
GOT limit on SPARC systems running BSD. This change makes CDE builds
on BSD more consistent with those on Linux, where -fPIC has been the
default without any reported issues.