Require GNU awk at ./configure time.
Some components (specifically {,e}glibc) will not build when awk
is not GNU awk. Make ./configure check for GNU awk.
1 reporter_name="Yann E. MORIN"
2 reporter_url="http://ymorin.is-a-geek.org/"
3 reporter_comment="This toolchain is pre-configured to target the BeagleBoard: http://beagleboard.org/"