EGL_ANDROID_native_fence_sync: Fix the attribute that must be set after a flush

The EGL_SYNC_NATIVE_FENCE_FD_ANDROID attribute of an EGL sync object is
intended to be set to a file descriptor that refers to the underlying
native fence object.

However, a sentence in the specification suggests that the
EGL_SYNC_NATIVE_FENCE_ANDROID attribute is used for storing file
descriptors instead. This is probably a typo since
EGL_SYNC_NATIVE_FENCE_ANDROID is not an attribute.

Author: dkorkmazturk

extensions/ANDROID/EGL_ANDROID_native_fence_sync.txt

@@ -122,10 +122,10 @@ Changes to Chapter 3 of the EGL 1.2 Specification (EGL Functions and Errors)
     After associating the fence command with an EGL native fence sync object,
     the next Flush() operation performed by the current client API causes a
     new native fence object to be created, and the
-    EGL_SYNC_NATIVE_FENCE_ANDROID attribute of the EGL native fence object is
-    set to a file descriptor that refers to the new native fence object. This
-    new native fence object is signaled when the EGL native fence sync object
-    is signaled.
+    EGL_SYNC_NATIVE_FENCE_FD_ANDROID attribute of the EGL native fence object
+    is set to a file descriptor that refers to the new native fence object.
+    This new native fence object is signaled when the EGL native fence sync
+    object is signaled.
 
     When the condition of the sync object is satisfied by the fence command,
     the sync is signaled by the associated client API context, causing any