Support out-of-tree build for downstream kernels
This MR:
- modifies pmb/build/menuconfig.py so menuconfig doesn't fail when building out-of-tree
- changes current downstream kernel template a little bit so it compiles the kernel out-of-tree
- adds
_outdir
to a list of variables to parse in APKBUILD
Closes #1852 (closed) and depends on pmaports!1084 (merged).
Edited by Administrator