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="unknown"
2 reporter_url="http://iphonelinux.org/index.php/Glibc_toolchain_using_crosstool-NG"
3 reporter_comment="An (experimental) toolchain targeting the Apple's iPhone."