Replace GL_ARB_debug_output in comments

(cherry picked from commit 85bce8a8ead47214404bc66c73aa49f13976a102)

include/GLFW/glfw3native.h

@@ -83,8 +83,8 @@ extern "C" {
 
 #if defined(GLFW_EXPOSE_NATIVE_WIN32) || defined(GLFW_EXPOSE_NATIVE_WGL)
  // This is a workaround for the fact that glfw3.h needs to export APIENTRY (for
- // example to allow applications to correctly declare a GL_ARB_debug_output
- // callback) but windows.h assumes no one will define APIENTRY before it does
+ // example to allow applications to correctly declare a GL_KHR_debug callback)
+ // but windows.h assumes no one will define APIENTRY before it does
  #if defined(GLFW_APIENTRY_DEFINED)
   #undef APIENTRY
   #undef GLFW_APIENTRY_DEFINED

src/win32_platform.h

@@ -39,8 +39,8 @@
 #endif
 
 // This is a workaround for the fact that glfw3.h needs to export APIENTRY (for
-// example to allow applications to correctly declare a GL_ARB_debug_output
-// callback) but windows.h assumes no one will define APIENTRY before it does
+// example to allow applications to correctly declare a GL_KHR_debug callback)
+// but windows.h assumes no one will define APIENTRY before it does
 #undef APIENTRY
 
 // GLFW on Windows is Unicode only and does not work in MBCS mode