Hide warning spam from collada2gltf

Change-Id: Id772a8f4ca9f46f8a36dede759495e06c8e43732
Reviewed-on: https://gerrit.libreoffice.org/11343Reviewed-by: David Tardon <dtardon@redhat.com>
Tested-by: David Tardon <dtardon@redhat.com>

external/collada2gltf/StaticLibrary_collada2gltf.mk

@@ -22,6 +22,10 @@ $(eval $(call gb_StaticLibrary_add_defs,collada2gltf,\
 	-DUSE_OPEN3DGC \
 ))
 
+# collada2gltf has a lot of warnings, suppress them.
+$(eval $(call gb_StaticLibrary_add_cxxflags,collada2gltf,\
+	-w \
+))
 ifeq ($(COM),MSC)
 $(eval $(call gb_StaticLibrary_add_defs,collada2gltf,\
 	-D_CRT_SECURE_NO_WARNINGS \