Don't compile .o files for executables with -fPIC. Bug 235657, r=seawood.

config/config.mk

@@ -425,9 +425,11 @@ MOZ_META_COMPONENTS_crypto_comps = pipboot pippki pipnss
 # Build using PIC by default
 # Do not use PIC if not building a shared lib (see exceptions below)
 #
+ifdef LIBRARY_NAME
 ifneq (,$(BUILD_SHARED_LIBS)$(FORCE_SHARED_LIB)$(FORCE_USE_PIC))
 _ENABLE_PIC=1
 endif
+endif
 
 # If module is going to be merged into the nsStaticModule, 
 # make sure that the entry points are translated and