./configure: enable user to specify path to some tools

/trunk/configure | 203 107 96 0 +++++++++++++++++++++++++++++++++-----------------------------
1 file changed, 107 insertions(+), 96 deletions(-)

 reporter_name="unknown"

 reporter_url="http://iphonelinux.org/index.php/Glibc_toolchain_using_crosstool-NG"

 reporter_comment="An (experimental) toolchain targeting the Apple's iPhone."