Bump the trunk version to 9.0.0svn

git-svn-id: https://llvm.org/svn/llvm-project/polly/trunk@351320 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/ReleaseNotes.rst b/docs/ReleaseNotes.rst
index abae9ff..a9e8c98 100644
--- a/docs/ReleaseNotes.rst
+++ b/docs/ReleaseNotes.rst
@@ -1,8 +1,8 @@
 ============================
-Release Notes 8.0 (upcoming)
+Release Notes 9.0 (upcoming)
 ============================
 
-In Polly 8 the following important changes have been incorporated.
+In Polly 9 the following important changes have been incorporated.
 
 .. warning::
 
diff --git a/docs/conf.py b/docs/conf.py
index 45629da..a881b91 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -49,9 +49,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = '8.0-devel'
+version = '9.0-devel'
 # The full version, including alpha/beta/rc tags.
-release = '8.0-devel'
+release = '9.0-devel'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.