dtrace tests: Regenerate makefiles after commit d0b2dbfa0ecf
Remove $FreeBSD$: one-line sh patternRemove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/
Add a regression test for r327794.MFC after: 2 weeks
Actually add the -x setenv test Makefile, missed in r326499.X-MFC with: r326499