Bump CINDEX_VERSION_MINOR due to additional APIs

0a51bc7 added a new API to libclang
but forgot to bump the minor version number.

There is no reasonable way to test this change, hence the lack of test
coverage.

(cherry picked from commit 79571aa)

Author: AaronBallman

clang/include/clang-c/Index.h

@@ -34,7 +34,7 @@
  * compatible, thus CINDEX_VERSION_MAJOR is expected to remain stable.
  */
 #define CINDEX_VERSION_MAJOR 0
-#define CINDEX_VERSION_MINOR 62
+#define CINDEX_VERSION_MINOR 63
 
 #define CINDEX_VERSION_ENCODE(major, minor) (((major)*10000) + ((minor)*1))