LibGL+LibGPU: Implement glPointSize

Author: https://github.com/gmta
Commit: 0dcb23ee96
Pull-request: https://github.com/SerenityOS/serenity/pull/13970
Reviewed-by: https://github.com/alimpfard
Reviewed-by: https://github.com/linusg
Reviewed-by: https://github.com/sunverwerth ✅

Userland/Libraries/LibGL/GLAPI.cpp

@@ -673,8 +673,7 @@ void glPixelStorei(GLenum pname, GLint param)
 
 void glPointSize(GLfloat size)
 {
-    // FIXME: implement
-    dbgln_if(GL_DEBUG, "glPointSize({}): unimplemented", size);
+    g_gl_context->gl_point_size(size);
 }
 
 void glPolygonMode(GLenum face, GLenum mode)