Added llvm-mc support for parsing the .abort directive.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75545 91177308-0d34-0410-b5e6-96231b3b80d8

tools/llvm-mc/AsmParser.h

@@ -115,6 +115,8 @@ private:
 
   // Darwin specific ".subsections_via_symbols"
   bool ParseDirectiveDarwinSubsectionsViaSymbols();
+
+  bool ParseDirectiveAbort(); // ".abort"
 };
 
 } // end namespace llvm