libgo: bump version number for upgrade to 1.6rc1

    
    Reviewed-on: https://go-review.googlesource.com/19233

From-SVN: r233156

gcc/go/gofrontend/MERGE

-c70e74c116d08c6f2e787551eb1366983815c032
+91833164072078a3fde7e9b05641ec3ed4a2f5d0
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.

libgo/configure

@@ -2514,7 +2514,7 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 ac_config_headers="$ac_config_headers config.h"
 
 
-libtool_VERSION=8:0:0
+libtool_VERSION=9:0:0
 
 
 # Default to --enable-multilib

libgo/configure.ac

@@ -11,7 +11,7 @@ AC_INIT(package-unused, version-unused,, libgo)
 AC_CONFIG_SRCDIR(Makefile.am)
 AC_CONFIG_HEADER(config.h)
 
-libtool_VERSION=8:0:0
+libtool_VERSION=9:0:0
 AC_SUBST(libtool_VERSION)
 
 AM_ENABLE_MULTILIB(, ..)