buildroot

gawk: bump to version 4.2.1

Enable static build. gawk builds statically just fine. The shared
library check has been removed in 4.1.1.

Remove the symlink force hunk from the no-versioned patch. The only user
of LN is in the part that this patch disables.

Add license file hash.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>