acpid: modify CFLAGS

acpid: modify CFLAGS

Override the hard-coded CFLAGS used in Makefile to reference our CFLAGS.

Without this patch if the DEBUG_OPTIMIZATION is enabled (using -O0) the
compile log shows acpid still using -O2 because the Makefile has various
hard coded CFLAGS defined.  Instead of using the hard coded CFLAGS,
we simply define the proper set within the recipe itself.

(From OE-Core rev: 710e773b0677b75181506959492b37cf77a0951f)

Signed-off-by: Joe Slater <jslater@windriver.com>
Signed-off-by: Jeff Polk <jeff.polk@windriver.com>
Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>