resolve some missing deps

package/MesaLib/Makefile

@@ -11,7 +11,7 @@ PKG_DESCR:=		MESA library
 PKG_SECTION:=		libs
 PKG_DEPENDS:=		libxdamage libxfixes libdrm libxxf86vm
 PKG_BUILDDEP:=		libXdamage libXfixes libXxf86vm libdrm
-PKG_BUILDDEP+=		dri2proto glproto expat
+PKG_BUILDDEP+=		dri2proto glproto expat libXext
 PKG_URL:=		http://www.mesa3d.org/
 PKG_SITES:=		ftp://ftp.freedesktop.org/pub/mesa/7.8.2/
 PKG_NEED_CXX:=		1

package/cairo/Makefile

@@ -10,7 +10,7 @@ PKG_MD5SUM:=		f101a9e88b783337b20b2e26dfd26d5f
 PKG_DESCR:=		cairo graphics library
 PKG_SECTION:=		libs
 PKG_DEPENDS:=		fontconfig libfreetype libpng libx11 pixman
-PKG_BUILDDEP:=		libpng pixman freetype fontconfig libX11
+PKG_BUILDDEP:=		libpng pixman freetype fontconfig libX11 libXrender
 PKG_URL:=		http://cairographics.org/
 PKG_SITES:=		http://cairographics.org/releases/