Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/Support/SMLoc.h b/linux-x64/clang/include/llvm/Support/SMLoc.h
index 5b8be55..c74feff 100644
--- a/linux-x64/clang/include/llvm/Support/SMLoc.h
+++ b/linux-x64/clang/include/llvm/Support/SMLoc.h
@@ -44,8 +44,8 @@
 /// Represents a range in source code.
 ///
 /// SMRange is implemented using a half-open range, as is the convention in C++.
-/// In the string "abc", the range (1,3] represents the substring "bc", and the
-/// range (2,2] represents an empty range between the characters "b" and "c".
+/// In the string "abc", the range [1,3) represents the substring "bc", and the
+/// range [2,2) represents an empty range between the characters "b" and "c".
 class SMRange {
 public:
   SMLoc Start, End;
@@ -54,7 +54,7 @@
   SMRange(NoneType) {}
   SMRange(SMLoc St, SMLoc En) : Start(St), End(En) {
     assert(Start.isValid() == End.isValid() &&
-           "Start and end should either both be valid or both be invalid!");
+           "Start and End should either both be valid or both be invalid!");
   }
 
   bool isValid() const { return Start.isValid(); }