make use of (f)lex -o option to create unique temporary files, so that
authorespie <espie@openbsd.org>
Wed, 5 Jul 2017 13:31:40 +0000 (13:31 +0000)
committerespie <espie@openbsd.org>
Wed, 5 Jul 2017 13:31:40 +0000 (13:31 +0000)
commit14e0d39582061dc0b86809aea4ed717936226485
tree39a84951048ea5c88f356d4f9e6776f2a732dfc5
parent8c219cff3819d53af9bf66050ad7a651e07dfaad
make use of (f)lex -o option to create unique temporary files, so that
make -j will be happier.

okay millert@
share/mk/bsd.sys.mk
share/mk/sys.mk