package/gstreamer/gst1-plugins-bad: fix build with neon

Fix the following build failure raised since bump of neon to version
0.32.2 in commit 029a6dc3:

../output-1/build/gst1-plugins-bad-1.18.5/ext/neon/meson.build:1:0: ERROR: Invalid version of dependency, need 'neon' ['<= 0.31.99'] found '0.32.2'.

Fixes:
 - http://autobuild.buildroot.org/results/eaf1890176431000ea8b371956f0d2d7e9907aea



Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>