[lldb] Make it so not finding and SDK doesn't look like an error (llvm#166676)

There may be valid reasons for not being able to find an SDK. Right now,
it's printed as an error, which is causing confusion for users that
interpret the error as something fatal, and not something that can be
ignored.

rdar://155346799

Author: JDevlieghere

lldb/source/Plugins/Platform/MacOSX/PlatformAppleSimulator.cpp

@@ -90,7 +90,7 @@ void PlatformAppleSimulator::GetStatus(Stream &strm) {
   if (!sdk.empty())
     strm << "  SDK Path: \"" << sdk << "\"\n";
   else
-    strm << "  SDK Path: error: unable to locate SDK\n";
+    strm << "  SDK Path: <unable to locate SDK>\n";
 
 #if defined(__APPLE__)
   // This will get called by subclasses, so just output status on the current

lldb/source/Plugins/Platform/MacOSX/PlatformRemoteDarwinDevice.cpp

@@ -53,7 +53,7 @@ void PlatformRemoteDarwinDevice::GetStatus(Stream &strm) {
   if (sdk_directory)
     strm.Printf("  SDK Path: \"%s\"\n", sdk_directory);
   else
-    strm.PutCString("  SDK Path: error: unable to locate SDK\n");
+    strm.PutCString("  SDK Path: <unable to locate SDK>\n");
 
   const uint32_t num_sdk_infos = m_sdk_directory_infos.size();
   for (uint32_t i = 0; i < num_sdk_infos; ++i) {