xml: require CL/GL types for cl_khr_gl_sharing

So the type definitions are included in the generated cl_gl.h

Change-Id: I65a666dde8066958897acf13fb755ae2a3f3b52d
Signed-off-by: Kevin Petit <kevin.petit@arm.com>

xml/cl.xml

@@ -6565,6 +6565,9 @@ server's OpenCL/api-docs repository.
         <extension name="cl_khr_gl_sharing" revision="1.0.0" supported="opencl" ratified="opencl">
             <require>
                 <type name="CL/cl.h"/>
+                <type name="cl_GLint"/>
+                <type name="cl_GLenum"/>
+                <type name="cl_GLuint"/>
             </require>
             <require>
                 <type name="cl_gl_context_info"/>