qemu-arm/test-frzmpy: Add test for freezing constant tuples.

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

ports/qemu-arm/test-frzmpy/frozen_const.py

@@ -0,0 +1,11 @@
+# Test freezing constants.
+
+x0 = (1,)
+x1 = (1, 2)
+x2 = (1, 1 << 100)
+x3 = (None, False, True, ...)
+x4 = ("str", b"bytes")
+x5 = ((),)
+x6 = ((1,),)
+x7 = ((1, 2),)
+x8 = (1, "str", (), ("nested", 2, ((False, True), None, ...)))