Fix linking on Intel Mac due to local relocation entries in

non-writable sections.
patch by Tom Harper d.thomas.harper gmail com

Originally committed as revision 7354 to svn://svn.ffmpeg.org/ffmpeg/trunk

configure

@@ -753,7 +753,7 @@ video4linux2="no"
 audio_oss="no"
 dv1394="no"
 need_memalign="no"
-SHFLAGS="-dynamiclib -Wl,-single_module -Wl,-install_name,\$(shlibdir)/\$(SLIBNAME),-current_version,\$(SPPVERSION),-compatibility_version,\$(SPPVERSION)"
+SHFLAGS="-dynamiclib -Wl,-single_module -Wl,-install_name,\$(shlibdir)/\$(SLIBNAME),-current_version,\$(SPPVERSION),-compatibility_version,\$(SPPVERSION) -read_only_relocs suppress"
 VHOOKSHFLAGS='-dynamiclib -Wl,-single_module -flat_namespace -undefined suppress -Wl,-install_name,$(shlibdir)/vhook/$@'
 extralibs=""
 strip="strip -x"