Update version to 8.0.0svn: cmake, includes files and docs

llvm-svn: 338555
diff --git a/libcxx/docs/conf.py b/libcxx/docs/conf.py
index 4c1ea36..f532e30 100644
--- a/libcxx/docs/conf.py
+++ b/libcxx/docs/conf.py
@@ -40,16 +40,16 @@
 
 # General information about the project.
 project = u'libc++'
-copyright = u'2011-2017, LLVM Project'
+copyright = u'2011-2018, LLVM Project'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
 # The short X.Y version.
-version = '7.0'
+version = '8.0'
 # The full version, including alpha/beta/rc tags.
-release = '7.0'
+release = '8.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.