audio/openal-soft: update to 1.18.1
- Add the EXAMPLES option
- Add a patch to fix the Jack backend for Jack 1
Changes: http://kcat.strangesoft.net/openal.html#release
ABI: https://abi-laboratory.pro/tracker/timeline/openal/
PR: 222437
Submitted by: kdrakehp@zoho.com
MFH: 2017Q3