[Buildroot] [PATCH] package/expat: security bump to version 2.2.7

[Peter Korsgaard]

>>>>> "Peter" == Peter Korsgaard <peter at korsgaard.com> writes:

 > Fixes the following security vulnerabilites:
 > CVE-2018-20843: In libexpat in Expat before 2.2.7, XML input including XML
 > names that contain a large number of colons could make the XML parser
 > consume a high amount of RAM and CPU resources while processing (enough to
 > be usable for denial-of-service attacks).

 > Signed-off-by: Peter Korsgaard <peter at korsgaard.com>

Committed to 2019.02.x and 2019.05.x, thanks.

-- 
Bye, Peter Korsgaard