Makefiles: Update flags for old GCC and other compilers.

Adds support for FreeBSD, which uses old gcc 4.2
Jung-uk Kim <jkim@FreeBSD.org>
Automated cleanup, no functional change.

Removed extraneous spaces.
Fix compiler warnings for casting issues (only some compilers).

Fixes compiler warnings from GCC 4.2 and perhaps other compilers.
Jung-uk Kim <jkim@FreeBSD.org>
AcpiDump: Add preliminary support for FreeBSD.

Adds the OSL file for FreeBSD. Updates makefile.
Jung-uk Kim <jkim@FreeBSD.org>