uClibc cleanup: - use full version string (0.9.30.1), instead of base (0.9.30) + extra (.1) - remove support for 0.9.28 and snapshots (building from SVN to be added later)

SVN-Revision: 15368

add support for alternative C libraries (currently only glibc/eglibc) other (related) changes: - kernel headers are now installed using "make headers_install" on 2.6 - target names now contain an openwrt "vendor" tag (e.g. mips-openwrt-linux-gnu) - build directory names now contain gcc/libc name/version - default cpu for x86 is now i486 (required to build glibc/eglibc)

SVN-Revision: 13931

Timeout while sanitizing links - rendering aborted. Please reduce the number of links if possible.