angle: fix some leaks and enable GLES 3.0

Fixes #4958
Fixes #7546

Author: osy

patches/sources

@@ -39,7 +39,7 @@ LIBUCONTEXT_COMMIT="9b1d8f01a6e99166f9808c79966abe10786de8b6"
 
 # Source files for GPU acceleration
 WEBKIT_REPO="https://github.com/utmapp/WebKit.git"
-WEBKIT_COMMIT="b5f22a32a49682059749b2cccac06231a20c1387"
+WEBKIT_COMMIT="fd69e8e0ecf1abe7813eeddacd6682b14515c85a"
 WEBKIT_SUBDIRS="Source/ThirdParty/ANGLE Configurations Tools/ccache"
 EPOXY_REPO="https://github.com/utmapp/libepoxy.git"
 EPOXY_COMMIT="266d2290a437c655f7419e85af06bfbb73a720c4"