Log Message:
deforaos-configure: update to 0.4.3

Changes since 0.4.1:
- add support for vendors in packages
- general improvements to the helper scripts
- hierarchical installation path for helper scripts
- new tool, configure-update(1), to refresh helper scripts
- improved rules to compile assembly code
- support different compilation modes (eg debug, release...)
- fix build with DeforaOS libSystem 0.4.3
- add support for Go targets
- fix building libraries with libtool (with --tags)