import latest version of bwk's "awk"

[Garrett D'Amore]

If we update awk, we might find we can get rid of xpg4/awk and nawk, consolidating on the One True Awk.

[Garrett D'Amore]

fixes #52 import latest version of bwk's "awk"

→ <<cset 8ee5decd76a9>>

[Garrett D'Amore]

"fix" was to a separate branch.

[Garrett D'Amore]

fixes #52 import latest version of bwk's "awk" (fix THIRDPARTYLICENSE)

→ <<cset 2a00306ffaa1>>