review: re-add missing LLVM_ABI

Author: inbelic

llvm/include/llvm/Frontend/HLSL/RootSignatureValidations.h

@@ -51,7 +51,7 @@ class ResourceRange {
   getOverlapping(const RangeInfo &Info) const;
 
   // Return the mapped RangeInfo at X or nullptr if no mapping exists
-  const RangeInfo *lookup(uint32_t X) const;
+  LLVM_ABI const RangeInfo *lookup(uint32_t X) const;
 
   // Removes all entries of the ResourceRange
   LLVM_ABI void clear();