JSSpecCompiler: Add our first test :^)

Author: https://github.com/DanShaders
Commit: 00928764e9
Pull-request: https://github.com/SerenityOS/serenity/pull/21612
Reviewed-by: https://github.com/ADKaster

Meta/Lagom/Tools/CodeGenerators/JSSpecCompiler/Tests/simple.cpp

@@ -0,0 +1,18 @@
+auto f(auto cond1, auto cond2)
+{
+    int a;
+    int b;
+
+    if (cond1) {
+        a = 1;
+        if (cond2) {
+            b = a;
+        } else {
+            b = 3;
+        }
+    } else {
+        b = 4;
+    }
+
+    return b;
+}