[compiler-rt] [CFI] Allow LoongArch (PR #67314)

[Fangrui Song via llvm-commits]

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@@ -51,7 +51,11 @@ using namespace __sanitizer;
 
 namespace __cfi {
 
+#if SANITIZER_LOONGARCH64
+#define kCfiShadowLimitsStorageSize 4096 * 4 // 16KiB on loongarch64 per page
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MaskRay wrote:

Just write 16384

https://github.com/llvm/llvm-project/pull/67314