opkg: fix several package installation bugs

opkg: fix several package installation bugs

Update to latest Git in order to import the following fixes:

19070b6 unarchive: fix possible segmentation fault in deb_extract()
758527e pkg: forward "provided_by_hand" flag in pkg_merge()
1fdc2ca pkg: mark bit fields in pkg_t unsigned
15fc1ee opkg_cmd: avoid null pointer dereference in opkg_what_depends_conflicts_cmd()
439c89e opkg_cmd: fix endless loop in whatprovides/whatreplaces
0fb3e9f pkg_depends: propagate virtual provided detail flag to providers
793155f pkg_depends: fix unsatisfied dependency installation order
b1dc770 libopkg: fix some overly aggressive line wrapping in pkg_depends.c

Signed-off-by: Jo-Philipp Wich <jo@mein.io>