Contribs: libmpeg2, do not use AC_C_ALWAYS_INLINE

contrib/src/libmpeg2/libmpeg2-inline.patch

+--- libmpeg2/configure.ac	2016-01-20 15:31:37.933547037 +0100
++++ libmpeg2.new/configure.ac	2016-01-20 15:05:40.931231465 +0100
+@@ -149,7 +149,6 @@
+ 
+ dnl Checks for typedefs, structures, and compiler characteristics.
+ AC_C_CONST
+-AC_C_ALWAYS_INLINE
+ AC_C_RESTRICT
+ AC_C_BUILTIN_EXPECT
+ AC_C_BIGENDIAN

contrib/src/libmpeg2/rules.mak

@@ -18,6 +18,7 @@ $(TARBALLS)/libmpeg2-$(LIBMPEG2_VERSION).tar.gz:
 libmpeg2: libmpeg2-$(LIBMPEG2_VERSION).tar.gz .sum-libmpeg2
 	$(UNPACK)
 	$(APPLY) $(SRC)/libmpeg2/libmpeg2-arm-pld.patch
+	$(APPLY) $(SRC)/libmpeg2/libmpeg2-inline.patch
 	$(APPLY) $(SRC)/libmpeg2/libmpeg2-mc-neon.patch
 	$(UPDATE_AUTOCONFIG) && cd $(UNPACK_DIR) && mv config.guess config.sub .auto
 	$(MOVE)