add definition for GLchar to match khronos verion and Chrome's version

include/EGL/eglplatform.h

Index: include/EGL/eglplatform.h
diff --git a/include/EGL/eglplatform.h b/include/EGL/eglplatform.h
index 22e855f56cad4deef0d5c4b3e5c9989a4150962a..6d34ab55db9fda679e8839b754dad4adffe375c9 100644
--- a/include/EGL/eglplatform.h
+++ b/include/EGL/eglplatform.h
@@ -25,7 +25,7 @@
 */
 
 /* Platform-specific types and definitions for egl.h
- * $Revision: 9724 $ on $Date: 2009-12-02 02:05:33 -0800 (Wed, 02 Dec 2009) $
+ * $Revision: 12306 $ on $Date: 2010-08-25 09:51:28 -0700 (Wed, 25 Aug 2010) $
  *
  * Adopters may modify khrplatform.h and this file to suit their platform.
  * You are encouraged to submit all modifications to the Khronos group so that
@@ -60,6 +60,11 @@
  * Windows Device Context. They must be defined in platform-specific
  * code below. The EGL-prefixed versions of Native*Type are the same
  * types, renamed in EGL 1.3 so all types in the API start with "EGL".
+ *
+ * Khronos STRONGLY RECOMMENDS that you use the default definitions
+ * provided below, since these changes affect both binary and source
+ * portability of applications using EGL running on different EGL
+ * implementations.
  */
 
 #if defined(_WIN32) || defined(__VC32__) && !defined(__CYGWIN__) && !defined(__SCITECH_SNAP__) /* Win32 and WinCE */