* Move package building/uploading implementation from config to a separate script.
* Implement new tag '%ci:no-build' to allow immediately stop build with status 'passed'.
%ci:no-build
These values are not sensitive data.
Also encryption of these values have side effect when they are same as part of
log output: e.g. word "termux-licenses" will become "SECRET-licenses" which may be confusing.
Cache instructions will query system to check if existing cache is available.
While cache will unlikely to be available in build task, it is better to
make it queried before build so if cache folder appear, it will be deleted by
`rm -rf "debs-${TERMUX_ARCH}"`.
Leonid Plyushch