llvm-mc: Fix memory leak of MCAsmInfo.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99098 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-mc/llvm-mc.cpp b/tools/llvm-mc/llvm-mc.cpp
index 62391b2..3c23990 100644
--- a/tools/llvm-mc/llvm-mc.cpp
+++ b/tools/llvm-mc/llvm-mc.cpp
@@ -152,7 +152,7 @@
   if (!TheTarget)
     return 1;
 
-  const MCAsmInfo *MAI = TheTarget->createAsmInfo(TripleName);
+  llvm::OwningPtr<MCAsmInfo> MAI((MCAsmInfo*) TheTarget->createAsmInfo(TripleName));
   assert(MAI && "Unable to create target asm info!");
 
   AsmLexer Lexer(*MAI);
@@ -260,7 +260,7 @@
   SrcMgr.setIncludeDirs(IncludeDirs);
   
   
-  const MCAsmInfo *MAI = TheTarget->createAsmInfo(TripleName);
+  llvm::OwningPtr<MCAsmInfo> MAI((MCAsmInfo*) TheTarget->createAsmInfo(TripleName));
   assert(MAI && "Unable to create target asm info!");
   
   MCContext Ctx(*MAI);