glapi: clarify the meaning of static_data.functions

Reviewed-by: Adam Jackson <ajax@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33634>

src/mapi/glapi/gen/gl_XML.py

@@ -619,7 +619,7 @@ class gl_function( gl_item ):
         assert not alias or not element.get('marshal_call_after')
         assert not alias or not element.get('deprecated')
 
-        if name in static_data.functions:
+        if name in static_data.libgl_public_functions:
             self.static_entry_points.append(name)
 
         self.entry_points.append( name )

src/mapi/glapi/gen/static_data.py

@@ -1707,7 +1707,8 @@ offsets = {
     "FramebufferTextureMultisampleMultiviewOVR": 1677,
 }
 
-functions = [
+# Exported from libGL.so and libGLX_mesa.so (libEGL_mesa.so doesn't export any)
+libgl_public_functions = [
     "Accum",
     "ActiveShaderProgram",
     "ActiveTexture",