Allow creating jails from a pojects branch, like projects/clang350-import
Merge remote-tracking branch 'origin/pr/246' into release-3.1

* origin/pr/246:
  XDEV: Setup env with MACHINE/MACHINE_ARCH based on the -a arguments to make bmake realize that its cross building.  Tested on builds of math/fftw3
  XDEV: Don't replace /sbin/sysctl as we need to emulate it to catch sysctl's and translate/override them in our emulator.
  XDEV: Remove path munging as the nxb-bin native-xtools toolchain does not link correctly in a lot of cases.
  XDEV: Add WITH_DEBUG=y for any mips64 build.  Strip is broken for this arch and hasn't been fixed in head/release.
3.1-RC3
XDEV:  Remove /bin/sh /bin/csh from the static hardlink list on mips/mips64 as there are endian issues to work out.
XDEV:  strip for mips and mips64 is broken, disable for all mips targets.
3.1.0 Release
/usr/lib/crt1.o is unsafe to use on FreeBSD 8 so for now only use it when using emulation
3.1.1 Release
Make WITH_ELFTOOLCHAIN_TOOLS=y the default for cross building
Make WITH_ELFTOOLCHAIN_TOOLS=y the default for mips only.  Remove WITH_DEBUG for mips.
Merge remote-tracking branch 'upstream/release-3.1' into release-3.1