cmdopts: Now accepts 0 or more -d opts

In preparation for the deviceSpecParser.

hcore/opts.cpp

@@ -39,7 +39,7 @@ void OptionParser::parseArguments(int argc, char *argv[])
             actuator.push_back(optarg);
             break;
         case 'd':
-            devFile = optarg;
+            deviceSpecFiles.push_back(optarg);
             break;
         case 'v':
             verbose = true;
@@ -87,5 +87,9 @@ void OptionParser::dumpOptions() const
     }
     std::cout << std::endl;
 
-    std::cout << "Dev file: " << devFile << std::endl;
+    std::cout << "Device Spec Files: ";
+    for (const auto& file : deviceSpecFiles) {
+        std::cout << file << " ";
+    }
+    std::cout << std::endl;
 }