examples: gl: sdl: link to the right in-tree libgstvideo

https://bugzilla.gnome.org/show_bug.cgi?id=796082
diff --git a/tests/examples/gl/sdl/Makefile.am b/tests/examples/gl/sdl/Makefile.am
index dd57509..7600c07 100644
--- a/tests/examples/gl/sdl/Makefile.am
+++ b/tests/examples/gl/sdl/Makefile.am
@@ -16,7 +16,7 @@
 	$(SDL_CFLAGS)
 sdlshare_LDADD= $(GST_LIBS) $(GL_LIBS) $(SDL_LIBS) \
 	$(top_builddir)/gst-libs/gst/gl/libgstgl-$(GST_API_VERSION).la \
-	-lgstvideo-$(GST_API_VERSION)
+	$(top_builddir)/gst-libs/gst/video/libgstvideo-$(GST_API_VERSION).la
 
 sdlshare2_SOURCES = sdlshare2.c
 
@@ -29,6 +29,6 @@
 	$(SDL_CFLAGS)
 sdlshare2_LDADD= $(GST_LIBS) $(GL_LIBS) $(SDL_LIBS) \
 	$(top_builddir)/gst-libs/gst/gl/libgstgl-$(GST_API_VERSION).la \
-	-lgstvideo-$(GST_API_VERSION)
+	$(top_builddir)/gst-libs/gst/video/libgstvideo-$(GST_API_VERSION).la
 
 endif