[lldb-moduleimport-test] Pass a target triple as a stopgap solution.

We're going to infer all these informations from the module, but
that's a large refactoring task which I'm going to do next.
In the meanwhile, this should allow Adrian's work to be unblocked.

<rdar://problem/38720742>

Author: Davide Italiano

test/DebugInfo/DumpDeclFromMangledName.swift

@@ -7,7 +7,7 @@
 // RUN: sed -ne '/--->/s/^.*---> *//p' < %S/Inputs/decl-reconstr-names.txt > %t.check
 
 // RUN: %target-build-swift -emit-executable %s -g -o %t/DeclReconstr -emit-module
-// RUN: %lldb-moduleimport-test %t/DeclReconstr \
+// RUN: %lldb-moduleimport-test %t/DeclReconstr -target-triple %target-triple \
 // RUN:   -decl-from-mangled=%t.input > %t.output 2>&1
 // RUN: diff %t.check %t.output
 

tools/lldb-moduleimport-test/lldb-moduleimport-test.cpp

@@ -138,6 +138,10 @@ int main(int argc, char **argv) {
   llvm::cl::opt<std::string> DumpTypeFromMangled(
       "type-from-mangled", llvm::cl::desc("dump type from mangled names list"));
 
+  // FIXME: we should infer this from the module.
+  llvm::cl::opt<std::string> TargetTriple(
+      "target-triple", llvm::cl::desc("specify target triple"));
+
   llvm::cl::ParseCommandLineOptions(argc, argv);
   // Unregister our options so they don't interfere with the command line
   // parsing in CodeGen/BackendUtil.cpp.
@@ -148,6 +152,7 @@ int main(int argc, char **argv) {
   DumpTypeFromMangled.removeArgument();
   SDK.removeArgument();
   InputNames.removeArgument();
+  TargetTriple.removeArgument();
 
   // If no SDK was specified via -sdk, check environment variable SDKROOT.
   if (SDK.getNumOccurrences() == 0) {
@@ -166,7 +171,13 @@ int main(int argc, char **argv) {
           reinterpret_cast<void *>(&anchorForGetMainExecutable)));
 
   Invocation.setSDKPath(SDK);
-  Invocation.setTargetTriple(llvm::sys::getDefaultTargetTriple());
+
+  // FIXME: we should infer this from the module.
+  if (!TargetTriple.empty())
+    Invocation.setTargetTriple(TargetTriple);
+  else
+    Invocation.setTargetTriple(llvm::sys::getDefaultTargetTriple());
+
   Invocation.setModuleName("lldbtest");
   Invocation.getClangImporterOptions().ModuleCachePath = ModuleCachePath;
   Invocation.setImportSearchPaths(ImportPaths);