Add targetStatus/? host command

Author: MaxDesiatov

Sources/GDBRemoteProtocol/GDBHostCommand.swift

@@ -16,6 +16,7 @@ package struct GDBHostCommand: Equatable {
         case currentThreadID
         case firstThreadInfo
         case subsequentThreadInfo
+        case targetStatus
 
         case generalRegisters
 
@@ -47,6 +48,9 @@ package struct GDBHostCommand: Equatable {
                 self = .firstThreadInfo
             case "qsThreadInfo":
                 self = .subsequentThreadInfo
+            case "?":
+                self = .targetStatus
+
             default:
                 return nil
             }

Sources/GDBRemoteProtocol/GDBTargetResponseEncoder.swift

@@ -23,7 +23,7 @@ package struct GDBTargetResponseEncoder: MessageToByteEncoder {
             out.writeBytes(info.map { (key, value) in "\(key):\(value);" }.joined().appendedChecksum)
 
         case .vContSupportedActions(let actions):
-            out.writeBytes("vCont;\(actions.map(\.rawValue).joined())".appendedChecksum)
+            out.writeBytes("vCont;\(actions.map { "\($0.rawValue);" }.joined())".appendedChecksum)
 
         case .raw(let str):
             out.writeBytes(str.appendedChecksum)