Add some minimal NetBSD compat shims to ease porting

Signed-off-by: Garrett Cooper <yanegomi@gmail.com>
Add some minimal NetBSD compat shims to ease porting

Signed-off-by: Garrett Cooper <yanegomi@gmail.com>
Port the libm testcases from NetBSD

Signed-off-by: Garrett Cooper <yanegomi@gmail.com>
Move bin/sh testcase from tools/regression to bin/sh/tests
Port over the bulk majority of tools/regression/usr.bin to ATF

Signed-off-by: Garrett Cooper <yanegomi@gmail.com>
Merge branch 'atf-tools-regression-convert' of github.com:/yaneurabeya/freebsd into atf-tools-regression-convert