Previously, ./configure was running checking local system and not
OpenWRT target. This would avoid any configure test about OpenWRT
libraries.
With a patch in configure, non cross-compiling-friend test are
ignored and Makefile can use default configure.
As side effect, git commands are now at /usr/lib/git-core and not
/usr/libexec/git-core.
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
