libcorrect: fix debug build

Add a patch to use -fsanitize=address only when available

Fixes:
 - http://autobuild.buildroot.net/results/221d6a418e75b39fe645c3a56cee676518d2cff6



Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>