mruby/mruby — pull request #2216 by tsahara (2014-05-09 05:30:33+00:00)
Title: libreadline requires libtermcap on OpenBSD.

"rake all" fails on OpenBSD without the patch:

```
...
LD build/host/bin/mirb
...
/usr/lib/libreadline.so.3.0: undefined reference to `tgetnum'
/usr/lib/libreadline.so.3.0: undefined reference to `tgoto'
/usr/lib/libreadline.so.3.0: undefined reference to `tgetflag'
/usr/lib/libreadline.so.3.0: undefined reference to `tputs'
/usr/lib/libreadline.so.3.0: undefined reference to `tgetent'
/usr/lib/libreadline.so.3.0: undefined reference to `tgetstr'
collect2: ld returned 1 exit status
```