Bump the trunk version to 8.0.0svn

llvm-svn: 338537
diff --git a/llvm/docs/conf.py b/llvm/docs/conf.py
index ce7df14..a20742b 100644
--- a/llvm/docs/conf.py
+++ b/llvm/docs/conf.py
@@ -48,9 +48,9 @@
 # built documents.
 #
 # The short version.
-version = '7'
+version = '8'
 # The full version, including alpha/beta/rc tags.
-release = '7'
+release = '8'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.