Update prebuilt Clang to r365631c1 from Android.

The version we had was segfaulting.

Bug: 132420445
Change-Id: Icb45a6fe0b4e2166f7895e669df1157cec9fb4e0
diff --git a/linux-x64/clang/include/llvm/Config/llvm-config.h b/linux-x64/clang/include/llvm/Config/llvm-config.h
index 483d60c..55f10fc 100644
--- a/linux-x64/clang/include/llvm/Config/llvm-config.h
+++ b/linux-x64/clang/include/llvm/Config/llvm-config.h
@@ -72,10 +72,10 @@
 #define LLVM_VERSION_MINOR 0
 
 /* Patch version of the LLVM API */
-#define LLVM_VERSION_PATCH 3
+#define LLVM_VERSION_PATCH 8
 
 /* LLVM version string */
-#define LLVM_VERSION_STRING "9.0.3svn"
+#define LLVM_VERSION_STRING "9.0.8svn"
 
 /* Whether LLVM records statistics for use with GetStatistics(),
  * PrintStatistics() or PrintStatisticsJSON()