[clang] [llvm] [LoongArch] add la v1.1 features for sys::getHostCPUFeatures (PR #115832)

[Lu Weining via cfe-commits]

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@@ -14,6 +14,7 @@
 #include "clang/Driver/Options.h"
 #include "llvm/TargetParser/Host.h"
 #include "llvm/TargetParser/LoongArchTargetParser.h"
+#include <string>
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SixWeining wrote:

Is this header necessary?

https://github.com/llvm/llvm-project/pull/115832