add WebP support.

component/imagemagick/buildout.cfg

@@ -16,6 +16,7 @@ extends =
   ../jasper/buildout.cfg
   ../jbigkit/buildout.cfg
   ../pkgconfig/buildout.cfg
+  ../webp/buildout.cfg
   ../zlib/buildout.cfg
 
 [imagemagick-6.6.6-1-no-gsx-gsc-probe.patch]
@@ -66,5 +67,5 @@ patches =
 environment =
   PATH=${freetype:location}/bin:${ghostscript:location}/bin:${pkgconfig:location}/bin:%(PATH)s
   PKG_CONFIG_PATH=${fontconfig:location}/lib/pkgconfig:${librsvg:location}/lib/pkgconfig
-  CPPFLAGS=-I${bzip2:location}/include -I${zlib:location}/include -I${jbigkit:location}/include -I${libjpeg:location}/include -I${libtiff:location}/include -I${libpng:location}/include -I${jasper:location}/include -I${freetype:location}/include
-  LDFLAGS=-L${bzip2:location}/lib -Wl,-rpath=${bzip2:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib -L${jbigkit:location}/lib -Wl,-rpath=${jbigkit:location}/lib -L${libjpeg:location}/lib -Wl,-rpath=${libjpeg:location}/lib -L${libtiff:location}/lib -Wl,-rpath=${libtiff:location}/lib -L${libpng:location}/lib -Wl,-rpath=${libpng:location}/lib -L${jasper:location}/lib -Wl,-rpath=${jasper:location}/lib -L${freetype:location}/lib -Wl,-rpath=${freetype:location}/lib
+  CPPFLAGS=-I${bzip2:location}/include -I${zlib:location}/include -I${jbigkit:location}/include -I${libjpeg:location}/include -I${libtiff:location}/include -I${libpng:location}/include -I${jasper:location}/include -I${freetype:location}/include -I${webp:location}/include
+  LDFLAGS=-L${bzip2:location}/lib -Wl,-rpath=${bzip2:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib -L${jbigkit:location}/lib -Wl,-rpath=${jbigkit:location}/lib -L${libjpeg:location}/lib -Wl,-rpath=${libjpeg:location}/lib -L${libtiff:location}/lib -Wl,-rpath=${libtiff:location}/lib -L${libpng:location}/lib -Wl,-rpath=${libpng:location}/lib -L${jasper:location}/lib -Wl,-rpath=${jasper:location}/lib -L${freetype:location}/lib -Wl,-rpath=${freetype:location}/lib -L${webp:location}/lib -Wl,-rpath=${webp:location}/lib