change HIDE_GL_LOG to DEBUG_GL, default to False

kivy/graphics/gl_debug_logger.pxi

@@ -3,7 +3,7 @@ from kivy.logger import Logger
 include "config.pxi"
 
 cdef inline void log_gl_error(str note):
-    IF not HIDE_GL_LOG:
+    IF DEBUG_GL:
         ret = glGetError()
         if ret:
             Logger.error("OpenGL Error: {note} {ret1} / {ret2}".format(

setup.py

@@ -110,7 +110,7 @@ c_options['use_x11'] = False
 c_options['use_gstreamer'] = None
 c_options['use_avfoundation'] = platform == 'darwin'
 c_options['use_osx_frameworks'] = platform == 'darwin'
-c_options['hide_gl_log'] = False
+c_options['debug_gl'] = False
 
 # now check if environ is changing the default values
 for key in list(c_options.keys()):