[llvm] [NFC]Make file-local cl::opt global variables static (PR #126486)

[Matt Arsenault via llvm-commits]

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@@ -33,7 +33,7 @@ using namespace llvm::object;
 using namespace llvm::support;
 
 namespace opts {
-cl::OptionCategory CXXDumpCategory("CXX Dump Options");
+static cl::OptionCategory CXXDumpCategory("CXX Dump Options");
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arsenm wrote:

Ditto 

https://github.com/llvm/llvm-project/pull/126486