tests/float: Skip new complex tests if complex unavailable.

These complex tests were recently added.

Signed-off-by: Damien George <damien@micropython.org>

tests/float/cmath_dunder.py

@@ -14,7 +14,7 @@ class TestFloat:
 
 class TestComplex:
     def __complex__(self):
-        return 1j + 10
+        return complex(10, 1)
 
 
 for clas in TestFloat, TestComplex:

tests/run-tests.py

@@ -532,6 +532,7 @@ def run_tests(pyb, tests, args, result_dir, num_threads=1):
     if not has_complex:
         skip_tests.add("float/complex1.py")
         skip_tests.add("float/complex1_intbig.py")
+        skip_tests.add("float/complex_reverse_op.py")
         skip_tests.add("float/complex_special_methods.py")
         skip_tests.add("float/int_big_float.py")
         skip_tests.add("float/true_value.py")