buildgcc: solidify and remove boilerplate code

- don't capture build_$package in a subshell by piping it
- move HOSTCFLAGS to build_GMP
- only create a build directory if a build happens
- automatically collect packages to build

Change-Id: Ic5a9f3f222faecd3381b413e5f25dff87262a855
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: http://review.coreboot.org/10475
Reviewed-by: Alexander Couzens <lynxis@fe80.eu>
Tested-by: build bot (Jenkins)

0 files changed, 0 insertions, 0 deletions