Update build version to 0.9.0

Author: lide

gensrc/script/gen_build_version.sh

@@ -25,7 +25,7 @@
 # contains the build version based on the git hash or svn revision.
 ##############################################################
 
-build_version="0.9-branch"
+build_version="0.9.0"
 
 unset LANG
 unset LC_CTYPE