Bump Pure version for 3.2 release

git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_32@169298 91177308-0d34-0410-b5e6-96231b3b80d8

Author: 32bitmicro

docs/ReleaseNotes.html

@@ -367,7 +367,7 @@ <h3>Pure</h3>
    C++, Fortran and Faust code in Pure programs if the corresponding
    LLVM-enabled compilers are installed).</p>
 
-<p>Pure version 0.54 has been tested and is known to work with LLVM 3.1 (and
+<p>Pure version 0.56 has been tested and is known to work with LLVM 3.2 (and
    continues to work with older LLVM releases >= 2.5).</p>
 
 </div>