a44f58 subr/pkg_setup_distclean.subr: rm(1) ${PKG_BASE_DIR} on-demand.

Authored and Committed by Lucio Andrés Illanes Albornoz (arab, vxp) 6 years ago
    subr/pkg_setup_distclean.subr: rm(1) ${PKG_BASE_DIR} on-demand.
    etc/build.usage: updated.
    subr/pkg_setup_{env,subdirs}.subr: split {cd,mkdir}(1) sequence into setup_env_subdirs.
    vars/env.vars: adds setup_distclean:variant & setup_subdirs:invariant build steps.
    
        
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