Platform: AN552: Use pyelftools instead of objcopy

The previous solution relied on GCC's objcopy even when
armclang or IAR toolchain was used.
The pyelftools can dump the sections independently and works
with all of the three toolchain.

Change-Id: Ia43a8d5d6e0dcd3930e3ca0ea73374857a517b8a
Signed-off-by: Bence Balogh <bence.balogh@arm.com>
3 files changed