Fix a typecheck_arithmetic_incomplete_or_sizeless_type error in GSYM/MergedFunctionsInfo.h

Author: hokein

llvm/include/llvm/DebugInfo/GSYM/MergedFunctionsInfo.h

@@ -24,7 +24,7 @@ struct FunctionInfo;
 struct MergedFunctionsInfo {
   std::vector<FunctionInfo> MergedFunctions;
 
-  void clear() { MergedFunctions.clear(); }
+  void clear();
 
   /// Query if a MergedFunctionsInfo object is valid.
   ///

llvm/lib/DebugInfo/GSYM/MergedFunctionsInfo.cpp

@@ -14,6 +14,8 @@
 using namespace llvm;
 using namespace gsym;
 
+void MergedFunctionsInfo::clear() { MergedFunctions.clear(); }
+
 llvm::Error MergedFunctionsInfo::encode(FileWriter &Out) const {
   Out.writeU32(MergedFunctions.size());
   for (const auto &F : MergedFunctions) {