[asan] fix typo

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@155345 91177308-0d34-0410-b5e6-96231b3b80d8

docs/AddressSanitizer.html

@@ -137,7 +137,7 @@ This means that tools like <tt>ulimit</tt> may not work as usually expected.
 
 
 <h2 id="status">Current Status</h2>
-AddressSanitizer is fully functional on supported platforms strating from LLVM 3.1.
+AddressSanitizer is fully functional on supported platforms starting from LLVM 3.1.
 However, the test suite is not fully integrated yet and we lack the testing
 process (buildbots).