docs: Add GL_ARB_map_buffer_alignment status to GL3.txt and release notes

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
diff --git a/docs/GL3.txt b/docs/GL3.txt
index 6d6fe71..4955f4d 100644
--- a/docs/GL3.txt
+++ b/docs/GL3.txt
@@ -136,7 +136,7 @@
   GL_ARB_conservative_depth                            DONE (all drivers that support GLSL 1.30)
   GL_ARB_shading_language_420pack                      DONE (all drivers that support GLSL 1.30)
   GL_ARB_internalformat_query                          DONE (i965, nv50, nvc0, r300, r600, radeonsi)
-  GL_ARB_map_buffer_alignment                          DONE (r300, r600, radeonsi)
+  GL_ARB_map_buffer_alignment                          DONE (all drivers)
 
 
 GL 4.3: