Bump the trunk version to 9.0.0svn

llvm-svn: 351320
diff --git a/libunwind/docs/conf.py b/libunwind/docs/conf.py
index 35b07a2..704a1d0 100644
--- a/libunwind/docs/conf.py
+++ b/libunwind/docs/conf.py
@@ -48,9 +48,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = '8.0'
+version = '9.0'
 # The full version, including alpha/beta/rc tags.
-release = '8.0'
+release = '9.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.