Add TargetRegistry::lookupTarget.

- This is a simplified mechanism which just looks up a target based on the
   target triple, with a few additional flags.

 - Remove getClosestStaticTargetForModule, the moral equivalent is now:
     lookupTarget(Mod->getTargetTriple, true, false, ...);

 - This no longer does the fuzzy matching with target data (based on endianness
   and pointer width) that getClosestStaticTargetForModule was doing, but this
   was deemed unnecessary.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77111 91177308-0d34-0410-b5e6-96231b3b80d8

tools/llvm-mc/llvm-mc.cpp

@@ -147,7 +147,10 @@ static int AssembleInput(const char *ProgName) {
   // Get the target specific parser.
   std::string Error;
   const Target *TheTarget =
-    TargetRegistry::getClosestStaticTargetForTriple(Triple, Error);
+    TargetRegistry::lookupTarget(Triple, 
+                                 /*FallbackToHost=*/true,
+                                 /*RequireJIT=*/false,
+                                 Error);
   if (TheTarget == 0) {
     errs() << ProgName << ": error: unable to get target for '" << Triple
            << "', see --version and --triple.\n";