coreutils: Update to latest cygwin patchset
pcre: Rebuild. Fix dependencies.
util-linux: Update to 2.25.1
heimdal: Rebuild. Fix dependencies.
m4: Rebuild
gawk: Rebuild. Fix dependencies.
findutils: Rebuild.
flex: Rebuild.
file: Rebuild
bison: Rebuild.
bison: Cleanup patch.
diffutils: Rebuild.
patch: Rebuild.
db: Rollback to 5.2.38