configure: ensure settings from user are also usable in the script
configure: ensure settings from user are also usable in the script

Allow things set by the user (--with-lib, --with-iconv, etc) to set
variables for use by other parts of the script.  Display values as
they're set.

Signed-off-by: Ben Walton <6f9de98cc1f3d6d6e7da9953ca2250e07ad38e43@artsci.utoronto.ca>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git