omxil: Remove the header check for the iomx module

Building the iomx version of the omxil module itself doesn't
require the private headers any longer, they're only necessary
when building the iomx wrapper code (which should be built by the
NDK makefile instead).
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>
(cherry picked from commit 8acfed11)

configure.ac

@@ -2305,18 +2305,7 @@ AC_ARG_ENABLE(iomx,
   [  --enable-iomx           iomx codec module (default disabled)])
 if test "${enable_iomx}" = "yes"
 then
-  CPPFLAGS_save="${CPPFLAGS}"
-  CPPFLAGS="${CPPFLAGS} -I${srcdir}/modules/codec/omxil" # For the OMX headers
-  AC_LANG_PUSH([C++])
-  AC_CHECK_HEADER(media/stagefright/OMXClient.h, [
-    VLC_ADD_PLUGIN([iomx])
-    VLC_ADD_CXXFLAGS([iomx], [-fno-exceptions -fno-rtti])
-    VLC_ADD_LIBS([iomx], [-lstagefright -lmedia -lutils -lbinder])
-  ], [
-    AC_MSG_ERROR("Could not find IOMX headers")
-  ])
-  AC_LANG_POP([C++])
-  CPPFLAGS="${CPPFLAGS_save}"
+  VLC_ADD_PLUGIN([iomx])
 fi
 
 dnl