xbps-src: don't set -i to xbps-install(1).

As reported by @pullmoll via https://github.com/void-linux/xbps/issues/190
the culprit is this assignment, rather than in the xbps code.

Tested with local and remote repos, no regressions found.

common/xbps-src/shutils/build_dependencies.sh

@@ -71,7 +71,7 @@ install_pkg_from_repos() {
 
     cmd=$XBPS_INSTALL_CMD
     [[ $cross ]] && cmd=$XBPS_INSTALL_XCMD
-    $cmd ${XBPS_SKIP_REMOTEREPOS:+-i} -AIy "$@" >$tmplogf 2>&1
+    $cmd -AIy "$@" >$tmplogf 2>&1
     rval=$?
 
     case "$rval" in