* Make sure CFLAGS are respected by setting LOCAL_UNZIP instead of
  LOCAL_ZIP and unsetting CFLAGS_OPT in the configure script.
* Don't strip too early by setting STRIP to a no-op and unsetting
  LFLAGS2 in the configure script.
* Cherry-pick a patch from Fedora to fix format warnings.
* Fix unzipsfx test on 32-bit arches by casting a literal argument to
  the correct type.

Debian's patches close several CVEs, including a few of which I wasn't
even aware. They also include the patches we were already carrying:

These were plucked directly from Debian so the names are the same:
10-unzip-handle-pkware-verify.patch
20-unzip-uidgid-fix.patch

Our unzip-6.0-heap-overflow-infloop.patch is covered by Debian's:
14-cve-2015-7696.patch
15-cve-2015-7697.patch
16-fix-integer-underflow-csiz-decrypted.patch

all pkgs needed to bootstrap -> system
others -> user