[PCH/Modules] Don't tie TargetOptions::LinkerVersion to a module/PCH, it's a driver only thing and doesn't affect any language/preprocessor/etc. semantics.

rdar://16714526

llvm-svn: 207570

clang/lib/Frontend/CompilerInvocation.cpp

@@ -1819,7 +1819,7 @@ std::string CompilerInvocation::getModuleHash() const {
   
   // Extend the signature with the target options.
   code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
-                      TargetOpts->ABI, TargetOpts->LinkerVersion);
+                      TargetOpts->ABI);
   for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
     code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);