Convert tools/regression/lib/libc/gen/test-arc4random into an ATF testcase and
rename as lib/libc/gen/arc4random_test

Sponsored by: EMC / Isilon Storage Division


git-svn-id: svn+ssh://svn.freebsd.org/base/head@274581 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
Remove test-arc4random from this Makefile so others can continue to use
this as-is for the time being


git-svn-id: svn+ssh://svn.freebsd.org/base/head@274582 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f