When using -F, skip pkg upgrade check

This avoids a loop where it would skip the actual
upgrade of pkg, then continue to fetch the requested
job and then find the pkg upgrade again.

This makes PKG_FLAG_SKIP_INSTALL disable PKG_FLAG_PKG_VERSION_TEST

Discussed with: bapt
pkg-info: Don't show -f when using compat -[q]O

Fixes: #642