package/libarchive: add four security patches

package/libarchive: add four security patches

Add backported patches for the following four security issues in libarchive.
There is no new release yet including these patches.

- CVE-2018-1000877 (https://nvd.nist.gov/vuln/detail/CVE-2018-1000877)

"libarchive version commit 416694915449219d505531b1096384f3237dd6cc onwards
(release v3.1.0 onwards) contains a CWE-415: Double Free vulnerability in
RAR decoder - libarchive/archive_read_support_format_rar.c, parse_codes(),
realloc(rar->lzss.window, new_size) with new_size = 0 that can result in
Crash/DoS. This attack appear to be exploitable via the victim must open a
specially crafted RAR archive."

- CVE-2018-1000878 (https://nvd.nist.gov/vuln/detail/CVE-2018-1000878)

"libarchive version commit 416694915449219d505531b1096384f3237dd6cc onwards
(release v3.1.0 onwards) contains a CWE-416: Use After Free vulnerability in
RAR decoder - libarchive/archive_read_support_format_rar.c that can result
in Crash/DoS - it is unknown if RCE is possible. This attack appear to be
exploitable via the victim must open a specially crafted RAR archive."

- CVE-2018-1000879 (https://nvd.nist.gov/vuln/detail/CVE-2018-1000879)

"libarchive version commit 379867ecb330b3a952fb7bfa7bffb7bbd5547205 onwards
(release v3.3.0 onwards) contains a CWE-476: NULL Pointer Dereference
vulnerability in ACL parser - libarchive/archive_acl.c,
archive_acl_from_text_l() that can result in Crash/DoS. This attack appear
to be exploitable via the victim must open a specially crafted archive
file."

- CVE-2018-1000880 (https://nvd.nist.gov/vuln/detail/CVE-2018-1000880)

"libarchive version commit 9693801580c0cf7c70e862d305270a16b52826a7 onwards
(release v3.2.0 onwards) contains a CWE-20: Improper Input Validation
vulnerability in WARC parser -
libarchive/archive_read_support_format_warc.c, _warc_read() that can result
in DoS - quasi-infinite run time and disk usage from tiny file. This attack
appear to be exploitable via the victim must open a specially crafted WARC
file."

Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>