And put awk for 89 into the Makefile. (I should switch to mk.)

https://git.debu.gs/gitweb/?p=euler;a=commitdiff;h=c0aa34f370e7482c585ca17ce488271a032c5f69
code, git.debu.gs | 2018-07-05 20:31:06 +0000 GMT | No.783

And put awk for 89 into the Makefile.  (I should switch to mk.)

[D H] Makefile
[D H] go/031.go
[D H] racket/026.rkt