Bump required cmake version on CMake.html.

llvm-svn: 120162
diff --git a/llvm/docs/CMake.html b/llvm/docs/CMake.html
index e2dac2e..c5c5538 100644
--- a/llvm/docs/CMake.html
+++ b/llvm/docs/CMake.html
@@ -68,7 +68,7 @@
 <ol>
 
   <li><p><a href="http://www.cmake.org/cmake/resources/software.html">Download</a>
-      and install CMake. Version 2.6.2 is the minimum required.</p>
+      and install CMake. Version 2.8 is the minimum required.</p>
 
   <li><p>Open a shell. Your development tools must be reachable from this
       shell through the PATH environment variable.</p>