[clang] [z/OS] Set the default arch for z/OS to be arch10 (PR #89854)

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:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

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git-clang-format --diff 2ace7bdcfe640c69bd4dcf508d39485e0ef7ea06 fe5ad9c1bc0b1c0d60451f017d7ec7a8233aaf26 -- clang/lib/Basic/Targets/SystemZ.h clang/lib/Driver/ToolChains/Arch/SystemZ.cpp clang/lib/Driver/ToolChains/Arch/SystemZ.h clang/lib/Driver/ToolChains/CommonArgs.cpp clang/lib/Driver/ToolChains/Gnu.cpp clang/test/Preprocessor/predefined-arch-macros.c
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View the diff from clang-format here.
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diff --git a/clang/lib/Basic/Targets/SystemZ.h b/clang/lib/Basic/Targets/SystemZ.h
index 15df4f3df6..a6e08ea993 100644
--- a/clang/lib/Basic/Targets/SystemZ.h
+++ b/clang/lib/Basic/Targets/SystemZ.h
@@ -32,8 +32,7 @@ class LLVM_LIBRARY_VISIBILITY SystemZTargetInfo : public TargetInfo {
 
 public:
   SystemZTargetInfo(const llvm::Triple &Triple, const TargetOptions &)
-      : TargetInfo(Triple),
-        ISARevision(getISARevision("z10")),
+      : TargetInfo(Triple), ISARevision(getISARevision("z10")),
         HasTransactionalExecution(false), HasVector(false), SoftFloat(false),
         UnalignedSymbols(false) {
     IntMaxType = SignedLong;

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https://github.com/llvm/llvm-project/pull/89854