[LLDB] Use SetErrorStringWithFormatv for cases that use LLVM style format strings

[mstorsjo]

Summary

SetErrorStringWithFormat only supports normal printf style format strings.

lldb/trunk/source/Plugins/Process/Windows/Common/NativeProcessWindows.cpp

Status NativeProcessWindows::Detach() {
   StateType state = GetState();
   if (state != eStateExited && state != eStateDetached) {
     error = DetachProcess();
     if (error.Success())
       SetState(eStateDetached);
     else
       LLDB_LOG(log, "Detaching process error: {0}", error);
   } else {
-    error.SetErrorStringWithFormat("error: process {0} in state = {1}, but "
+    error.SetErrorStringWithFormatv("error: process {0} in state = {1}, but "
                                     "cannot detach it in this state.",
                                     GetID(), state);
     LLDB_LOG(log, "error: {0}", error);
   }
   return error;
 }
 
 Status NativeProcessWindows::Signal(int signo) {
   Status error;
   error.SetErrorString("Windows does not support sending signals to processes");

lldb/trunk/source/Plugins/Process/Windows/Common/ProcessWindows.cpp

Status ProcessWindows::DoDetach(bool keep_stopped) {
   StateType private_state = GetPrivateState();
   if (private_state != eStateExited && private_state != eStateDetached) {
     error = DetachProcess();
     if (error.Success())
       SetPrivateState(eStateDetached);
     else
       LLDB_LOG(log, "Detaching process error: {0}", error);
   } else {
-    error.SetErrorStringWithFormat("error: process {0} in state = {1}, but "
+    error.SetErrorStringWithFormatv("error: process {0} in state = {1}, but "
                                     "cannot detach it in this state.",
                                     GetID(), private_state);
     LLDB_LOG(log, "error: {0}", error);
   }
   return error;
 }
 
 Status ProcessWindows::DoLaunch(Module *exe_module,
                                 ProcessLaunchInfo &launch_info) {
   Status error;