Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/Config/llvm-config.h b/linux-x64/clang/include/llvm/Config/llvm-config.h
index 07fa1c8..5e0844c 100644
--- a/linux-x64/clang/include/llvm/Config/llvm-config.h
+++ b/linux-x64/clang/include/llvm/Config/llvm-config.h
@@ -56,26 +56,26 @@
 /* Define if this is Unixish platform */
 #define LLVM_ON_UNIX 1
 
-/* Define if this is Win32ish platform */
-/* #undef LLVM_ON_WIN32 */
-
 /* Define if we have the Intel JIT API runtime support library */
 #define LLVM_USE_INTEL_JITEVENTS 0
 
 /* Define if we have the oprofile JIT-support library */
 #define LLVM_USE_OPROFILE 0
 
+/* Define if we have the perf JIT-support library */
+#define LLVM_USE_PERF 0
+
 /* Major version of the LLVM API */
-#define LLVM_VERSION_MAJOR 7
+#define LLVM_VERSION_MAJOR 8
 
 /* Minor version of the LLVM API */
 #define LLVM_VERSION_MINOR 0
 
 /* Patch version of the LLVM API */
-#define LLVM_VERSION_PATCH 2
+#define LLVM_VERSION_PATCH 1
 
 /* LLVM version string */
-#define LLVM_VERSION_STRING "7.0.2svn"
+#define LLVM_VERSION_STRING "8.0.1svn"
 
 /* Whether LLVM records statistics for use with GetStatistics(),
  * PrintStatistics() or PrintStatisticsJSON()