tests: Add test for compile builtin.

tests/basics/builtin_compile.py

+# test compile builtin
+
+try:
+    compile
+except NameError:
+    print("SKIP")
+    import sys
+    sys.exit()
+
+c = compile("print(x)", "file", "exec")
+
+try:
+    exec(c)
+except NameError:
+    print("NameError")
+
+x = 1
+exec(c)
+
+exec(c, {"x":2})
+exec(c, {}, {"x":3})