[NFC] Fix Werror=extra warning related to mismatched enum type (#112808)

This is one of the many PRs to fix errors with LLVM_ENABLE_WERROR=on.
Built by GCC 11.

Fix warnings:

llvm-project/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp: In member
function ‘void llvm::AsmPrinter::emitJumpTableSizesSection(const
llvm::MachineJumpTableInfo*, const llvm::Function&) const’:
llvm-project/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp:2852:31: error:
enumerated and non-enumerated type in conditional expression
[-Werror=extra]
 2852 |     int Flags = F.hasComdat() ? ELF::SHF_GROUP : 0;
      |                 ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~

llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp

@@ -2849,7 +2849,7 @@ void AsmPrinter::emitJumpTableSizesSection(const MachineJumpTableInfo *MJTI,
 
   if (isElf) {
     MCSymbolELF *LinkedToSym = dyn_cast<MCSymbolELF>(CurrentFnSym);
-    int Flags = F.hasComdat() ? ELF::SHF_GROUP : 0;
+    int Flags = F.hasComdat() ? (unsigned)ELF::SHF_GROUP : 0;
 
     JumpTableSizesSection = OutContext.getELFSection(
         sectionName, ELF::SHT_LLVM_JT_SIZES, Flags, 0, GroupName, F.hasComdat(),