[Buildroot] [PATCH 1/1] package/cjson: bump to version 1.7.15

[Peter Korsgaard]

>>>>> "Fabrice" == Fabrice Fontaine <fontaine.fabrice at gmail.com> writes:

 > Fixes:
 > - Fix potential core dumped for strrchr
 > - Fix null pointer crash in cJSON_CreateXxArray
 > - Fix several null pointer problems on allocation failure
 > - Fix a possible dereference of null pointer

 > https://github.com/DaveGamble/cJSON/releases/tag/v1.7.15

 > Signed-off-by: Fabrice Fontaine <fontaine.fabrice at gmail.com>

Committed to 2021.02.x and 2021.05.x, thanks.

-- 
Bye, Peter Korsgaard