gstreamer1: Disable debug + other fixes

Disabled a bunch of debug stuff in order to save size.

Also removed the rpath stuff as that has not been needed for a long time.

Added PKG_BUILD_PARALLEL for faster compilation.

Removed two patches that have --disable configure parameters now.

Refreshed patches.

Size of libgstreamer1 from 822243 to 529366 on mvebu.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

multimedia/gstreamer1/patches/001-no-translations.patch

@@ -18,7 +18,7 @@
  	data
 --- a/configure.ac
 +++ b/configure.ac
-@@ -1086,7 +1086,6 @@ libs/gst/net/Makefile
+@@ -1108,7 +1108,6 @@ libs/gst/net/Makefile
  plugins/Makefile
  plugins/elements/Makefile
  plugins/tracers/Makefile