testing/mono: fix symlinking
Fixes #12388 (closed)
Mono is unable to run because it searches for a wrong library name. Nevertheless, it can be fixed symlinking libmono-native.so.0 to libmono-native.so.
Notes:
The prepare() function of the previous APKBUILD was removed because Mono was not building.
See here for the previous Mono APKBUILD and here for the log error with the added prepare() function.
Edited by Antoni Aloy Torrens