[clang] [clang][LoongArch] Add OHOS target (PR #127555)

[Lu Weining via cfe-commits]

================
@@ -368,7 +370,12 @@ void OHOS::addExtraOpts(llvm::opt::ArgStringList &CmdArgs) 
const {
   CmdArgs.push_back("-z");
   CmdArgs.push_back("relro");
   CmdArgs.push_back("-z");
-  CmdArgs.push_back("max-page-size=4096");
+  // LoongArch needs page size 16K
+  if (getArch() == llvm::Triple::loongarch64) {
+    CmdArgs.push_back("max-page-size=16384");
+  } else {
+    CmdArgs.push_back("max-page-size=4096");
+  }
----------------
SixWeining wrote:

```suggestion
  CmdArgs.push_back(getArch() == llvm::Triple::loongarch64
                        ? "max-page-size=16384"
                        : "max-page-size=4096");
```

https://github.com/llvm/llvm-project/pull/127555
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