HOST_CFLAGS were ignored as they were passed on incorrectly which lead
to build failure if OpenSSL wasn't present on the build host.
Fix that by properly passing HOST_CFLAGS when building each tool.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Package ARM Trusted Firmware host tools separately.
(instead of building tfa-fiptool as part of tfa-layerscape)
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
