[clang] Disable -fdollars-in-identifiers by default (PR #135407)

[via cfe-commits]

================
@@ -1,5 +1,5 @@
 // REQUIRES: x86-registered-target
-// RUN: %clang_cc1 %s -triple i386-apple-darwin10 -fasm-blocks -emit-llvm -o - | FileCheck %s
+// RUN: %clang_cc1 %s -triple i386-apple-darwin10 -fdollars-in-identifiers -fasm-blocks -emit-llvm -o - | FileCheck %s
----------------
R-Goc wrote:

> maybe we want to enable it only for clang-cl and not clang?
This sounds like an even less expected corner case that would be very annoying. 

https://github.com/llvm/llvm-project/pull/135407