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/MC/MCSection.h b/linux-x64/clang/include/llvm/MC/MCSection.h
index 27490dc..6fad1ec 100644
--- a/linux-x64/clang/include/llvm/MC/MCSection.h
+++ b/linux-x64/clang/include/llvm/MC/MCSection.h
@@ -37,7 +37,7 @@
 /// current translation unit.  The MCContext class uniques and creates these.
 class MCSection {
 public:
-  enum SectionVariant { SV_COFF = 0, SV_ELF, SV_MachO, SV_Wasm };
+  enum SectionVariant { SV_COFF = 0, SV_ELF, SV_MachO, SV_Wasm, SV_XCOFF };
 
   /// Express the state of bundle locked groups while emitting code.
   enum BundleLockStateType {