apt: Upgrade to 1.2.12

apt: Upgrade to 1.2.12

Test was made building core-image-sato with package_deb on qemux86 and
qemuarm then run for two of them testimage and install packages with
apt-get using PACKAGE_FEED_URI's configuration.

Now apt support drop priviligies for install packages using a sandbox
with _apt user, the useradd class was inherit and configured to install
_apt user and group.

Rebased patches:

	- 0001-Revert-always-run-dpkg-configure-a-at-the-end-of-our.patch
        - 0001-fix-the-gcc-version-check.patch
	- 0001-remove-Wsuggest-attribute-from-CFLAGS.patch
	- disable-test.patch
	- no-curl.patch

Signed-off-by: Aníbal Limón <anibal.limon@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>