sim_main: Print clear error in case CreateProcessA fails (#3104) (#3161)

(cherry picked from commit 08dc62d)

Signed-off-by: Silvio Traversaro <[email protected]>
Co-authored-by: Silvio Traversaro <[email protected]>
Co-authored-by: Addisu Z. Taddese <[email protected]>

Author: 3 people

src/cmd/sim_main.cc

@@ -160,6 +160,8 @@ int launchProcess(
     if(!CreateProcessW(NULL, cmd_line, NULL, NULL, FALSE, 0,
                       NULL, NULL, &si, &pi))
     {
+      gzerr << "Failure in creating process for command "
+            << command << std::endl;
       return -1;
     }