place zig-cache directory next to build.zig

* search upwards, if no build.zig is found
* if this fails or any error occurs, fallback to global zig-cache

Closes #11672
8cab0762d8Jan Philipp Hafer committed on 9/14/2022, 11:39:25 PM· committed by Andrew Kelleyparent3250b20
1 file changedLine totals unavailable