Bug #44353 build-v9.bat is missing in source archive

Entry for build-vs9.bat and build-vs9_x64.bat was missing in
win/Makefile.am. Added the entries to fix the problem.

win/Makefile.am

@@ -14,8 +14,9 @@
 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
 ## Process this file with automake to create Makefile.in
-EXTRA_DIST = build-vs71.bat build-vs8.bat build-vs8_x64.bat configure.js README \
-             mysql_manifest.cmake create_manifest.js
+EXTRA_DIST = build-vs71.bat build-vs8.bat build-vs8_x64.bat build-vs9.bat \
+             build-vs9_x64.bat configure.js README mysql_manifest.cmake \
+             create_manifest.js
 
 # Don't update the files from bitkeeper
 %::SCCS/s.%