[clang] [clang][ARM64EC] Add support for hybrid_patchable attribute. (PR #99478)

[Jacek Caban via cfe-commits]

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@@ -477,6 +477,9 @@ def TargetELF : TargetSpec {
 def TargetELFOrMachO : TargetSpec {
   let ObjectFormats = ["ELF", "MachO"];
 }
+def TargetArm64EC : TargetSpec {
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cjacek wrote:

I renamed it to `TargetWindowsArm64EC` in the new version.

https://github.com/llvm/llvm-project/pull/99478