unbreak it on linux.

widget/tests/scribble/Makefile.in

@@ -68,6 +68,7 @@ LIBS := \
 	$(JPEG_LIBS) \
 	-ljs \
 	-ljsdom \
+	-ljsurl \
 	$(DIST)/lib/libjsdomcore_s.a \
 	$(JSJ_LIB) \
 	-lmimetype \

widget/tests/scribble/Scribble.cpp

@@ -59,6 +59,8 @@ static nsIImageRequest  *gImageReq = nsnull;
 #endif
 
 #ifdef XP_UNIX
+#define WIDGET_DLL "libwidgetgtk.so"
+#define GFXWIN_DLL "libgfxgtk.so"
 #define TEXT_HEIGHT 30
 #define FILE_URL_PREFIX "file://"
 #endif