Update prebuilt Clang to r416183b from Android.

https://android.googlesource.com/platform/prebuilts/clang/host/
linux-x86/+/06a71ddac05c22edb2d10b590e1769b3f8619bef

clang 12.0.5 (based on r416183b) from build 7284624.

Change-Id: I277a316abcf47307562d8b748b84870f31a72866
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/linux-x64/clang/include/llvm/ADT/PointerEmbeddedInt.h b/linux-x64/clang/include/llvm/ADT/PointerEmbeddedInt.h
index 3eb6edb..fbc48af 100644
--- a/linux-x64/clang/include/llvm/ADT/PointerEmbeddedInt.h
+++ b/linux-x64/clang/include/llvm/ADT/PointerEmbeddedInt.h
@@ -94,7 +94,7 @@
     return T(reinterpret_cast<uintptr_t>(P), typename T::RawValueTag());
   }
 
-  enum { NumLowBitsAvailable = T::Shift };
+  static constexpr int NumLowBitsAvailable = T::Shift;
 };
 
 // Teach DenseMap how to use PointerEmbeddedInt objects as keys if the Int type