[tests] Add issue number as suffix to avoid clash

Author: tobil4sk

tests/unit/src/scripthost/Issue12376.hx

@@ -1,15 +1,15 @@
 package scripthost;
 
 #if cpp
-@:keep class HostParent {
+@:keep class HostParent12376 {
 	public function new() {}
 
 	public function methodA() {
 		return "HostParent.methodA()";
 	}
 }
 
-@:keep class HostChild extends HostParent {
+@:keep class HostChild12376 extends HostParent12376 {
 	override function methodA() {
 		return "HostChild.methodA()";
 	}

tests/unit/src/unit/issues/Issue12376.hx

@@ -14,7 +14,7 @@ class Issue12376 extends Test {
 }
 
 #if cppia
-private class ScriptChild extends HostChild {
+private class ScriptChild extends HostChild12376 {
 	override function methodB() {
 		return 'ScriptChild.methodB()';
 	}