Make a couple minor corrections to gl_API.xml.  Fixes the name of an
extension that was missing the GL_ part and uses the core GL type names for
vertex buffer object functions instead of the ARB names.

Also commits the resulting changes to the generated code.  Some how, the
#if sequence disappeared in the 1.52 version of glapi_x86.S.
diff --git a/src/mesa/glapi/gl_API.dtd b/src/mesa/glapi/gl_API.dtd
index 352e1b5..4adfaac 100644
--- a/src/mesa/glapi/gl_API.dtd
+++ b/src/mesa/glapi/gl_API.dtd
@@ -22,12 +22,12 @@
                    vectorequiv         NMTOKEN #IMPLIED>
 <!ATTLIST size     name                NMTOKEN #REQUIRED
                    count               NMTOKEN #IMPLIED
-                   mode                NMTOKEN #IMPLIED>
+                   mode                (get | set) "set">
 <!ATTLIST param    name                NMTOKEN #REQUIRED
                    type                CDATA   #REQUIRED
                    count               NMTOKEN #IMPLIED
                    counter             (true | false) "false"
-                   count_scale         NMTOKEN #IMPLIED
+                   count_scale         NMTOKEN "1"
                    output              (true | false) "false"
                    img_width           NMTOKEN #IMPLIED
                    img_height          NMTOKEN #IMPLIED