aalib: disable compilation on darwin
glib: fix build on darwin

* add libintlOrEmpty to build inputs
* add -lintl to LDFLAGS
gst-plugins-base: fix build on darwin

* add libintlOrEmpty to build inputs
* add -lintl to LDFLAGS
gst-plugins-good: fix build on darwin

* disable pulseaudio
* disable aalib
* disable libavc1394
* disable libiec61883
* add libintlOrEmpty to build inputs
* add -lintl to LDFLAGS
* build with clangStdenv
libavc1394: disable build on darwin
libdv: disable build on darwin
libraw1394: disable build on darwin
gst-plugins-good: fix build on darwin

* disable pulseaudio
* disable libdv
* disable aalib
* disable libavc1394
* disable libiec61883
* add libintlOrEmpty to build inputs
* add '-lintl' to LDFLAGS
* build with gccApple
gtk+: fix build on darwin

* add '-lintl' to LDFLAGS
gst-python: add expression