Security fix, CVE-2017-14491, DNS heap buffer overflow.(1)

Security fix, CVE-2017-14491, DNS heap buffer overflow.(1)

Fix heap overflow in DNS code. This is a potentially serious
security hole. It allows an attacker who can make DNS
requests to dnsmasq, and who controls the contents of
a domain, which is thereby queried, to overflow
(by 2 bytes) a heap buffer and either crash, or
even take control of, dnsmasq.

http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=0549c73b7ea6b22a3c49beb4d432f185a81efcbc

Change-Id: I3cc432632f51e89b888f3a5d999ba422c134847a
Signed-off-by: Seonah Moon <seonah1.moon@samsung.com>