* Update make_libsecp256k1.sh
Avoid error when parent folder has spaces `./make_libsecp256k1.sh: line 31: cd: too many arguments`
* Avoid error when parent folder has spaces, fix for make_libsecp256k1.sh, make_zbar.sh and make_libusb.sh
Co-authored-by: ghost43 <somber.night@protonmail.com>
This includes two logically separate changes:
- on the host, try not to require sudo when running the build scripts
- namely when interacting with the docker daemon, this requires
the unix user on the host to be part of the `docker` group
- this solves part of https://github.com/spesmilo/electrum/issues/7602
- while running inside the docker containers, do not run as root
- this means that e.g. files created in mounted folders should
no longer be owned by root on the host
- there is some code duplication involved here - not sure
how it could be deduped.
