[Buildroot] [PATCH 1/1] package/libjson: fix build with gcc 11

[Peter Korsgaard]

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

 > Fix the following build failure with gcc 11:
 > In file included from _internal/Source/JSONDefs.h:12,
 >                  from _internal/Source/JSONDebug.h:4,
 >                  from _internal/Source/JSONNode.h:4,
 >                  from _internal/Source/JSONNode.cpp:1:
 > _internal/Source/JSONDefs/GNU_C.h:58:28: error: ISO C++17 does not allow dynamic exception specifications
 >    58 |     #define json_throws(x) throw(x)
 >       |                            ^~~~~

 > Fixes:
 >  - http://autobuild.buildroot.org/results/1e66dff705bbb38e7e0f0e5864ce794b4345dcc6

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

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

-- 
Bye, Peter Korsgaard