clean up build flag handling

Use standardized CPPFLAGS/CFLAGS names and make sure the right values go
into each variable.  Avoid useless CPPFLAGS but respect LDFLAGS when
linking the utils.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
1 file changed