swupdate: bump to version 2016.04

swupdate: bump to version 2016.04

Also:
 * Update the .config file
 * Update the help text:
    - Lua support is not restricted to Lua 5.2
    - U-Boot supports needs now BR2_PACKAGE_UBOOT_TOOLS additionally
 * Remove comment about bundled lsqlite3, it has been removed.
 * Remove upstream patches:
    - "Kbuild: Fix link error for CONFIG_UBOUT and missing libz" [1]
    - "Kbuild: Link with GCC instead of LD" [2]
 * Add patch from upstream:
    - "Fix build without MTD support" [3]
 * Add optional dependency for libarchive
 * Add optional dependency for uboot-tools

[1] https://github.com/sbabic/swupdate/commit/5a5ef5909f5da5b2070d58ffaee924bb8e6a51e1
[2] https://github.com/sbabic/swupdate/commit/f26577423eb65728fcd10f78f9978dd07d51dcb9
[3] https://github.com/sbabic/swupdate/commit/69c0e66994f01ce1bf2299fbce86aee7a1baa37b

Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
[Thomas: add host-pkgconf in the dependency when Lua is enabled, as it
is used to find Lua.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>