memcpy: fix pointless test

When testing memcpy, we should use buffers with *different* content,
otherwise memcpy() would pass when implemented as a NOP.

Prime our buffers with two different values, to tell them apart and to
be able to verify the actual copying.

Change-Id: I2183be9560e2f2a284199b5d3fd19e361358890c
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
1 file changed