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-c/Transforms/Utils.h b/linux-x64/clang/include/llvm-c/Transforms/Utils.h
index ff28833..63594ab 100644
--- a/linux-x64/clang/include/llvm-c/Transforms/Utils.h
+++ b/linux-x64/clang/include/llvm-c/Transforms/Utils.h
@@ -38,6 +38,9 @@
 /** See llvm::createPromoteMemoryToRegisterPass function. */
 void LLVMAddPromoteMemoryToRegisterPass(LLVMPassManagerRef PM);
 
+/** See llvm::createAddDiscriminatorsPass function. */
+void LLVMAddAddDiscriminatorsPass(LLVMPassManagerRef PM);
+
 /**
  * @}
  */