New comment by pullmoll on void-packages repository

https://github.com/void-linux/void-packages/pull/18045#issuecomment-572159110

Comment:
@ndowens If you change the Makefile to add to LIBS, i.e. `LIBS += ` instead of `LIBS = `, you can then just set `LIBS="-lexecinfo"` in the template and avoid the `EXECINFO` variable which otherwise pollutes the environment.