v0.9.6: add missing call/aabb2d.h to auto tools build

• add missing call/aabb2d.h to auto tools build install
• see previous release for more: https://github.com/recp/cglm/releases/tag/v0.9.5

Full Changelog: v0.9.5...v0.9.6

Known or Possible Issues for Next Versions:

• Missing Handed / Clipspace bound implementations

❤️ Sponsorship: Consider become a sponsor for cglm

Supporting cross platform, multiple OS-es and multiple CPUs requires multiple hardwares to test on it which requires extra financial cost. Also sparing time is another big issue while working at somewhere fulltime... Your company can become a sponsor to help:

https://github.com/sponsors/recp
https://opencollective.com/cglm#backer
https://patreon.com/recp