circular freetype and harfbuzz dependency

harfbuzz needs freetype, freetype wants harfbuzz but can live
without it

Change-Id: I4b5dbd937ccfc9af46c86be5ae1d3f8eeb14e86b

external/freetype/ExternalProject_freetype.mk

@@ -9,10 +9,6 @@
 
 $(eval $(call gb_ExternalProject_ExternalProject,freetype))
 
-$(eval $(call gb_ExternalProject_use_externals,freetype,\
-	harfbuzz \
-))
-
 $(eval $(call gb_ExternalProject_register_targets,freetype,\
 	build \
 ))
@@ -30,6 +26,7 @@ $(call gb_ExternalProject_get_state_target,freetype,build) :
 			--disable-shared \
 			--without-zlib \
 			--without-bzip2 \
+			--without-harfbuzz \
 			--prefix=$(call gb_UnpackedTarball_get_dir,freetype/instdir) \
 			--build=$(BUILD_PLATFORM) --host=$(HOST_PLATFORM) \
 			CFLAGS="$(if $(debug),-g) $(gb_VISIBILITY_FLAGS)" \

vcl/commonfuzzer.mk

@@ -24,6 +24,7 @@ fuzzer_externals = \
     libxslt \
     libxml2 \
     jpeg \
+    png \
     clew \
     openssl \
     expat \