Bazel package building

Bazel rules for building tar, zip, deb, and rpm for packages.

Use rules-pkg-discuss@googlegroups.com for discussion.

CI:

Basic rules

Package building rules

• pkg - Rules for building packages of various types.

Bazel now uses this rule set for packaging its distribution. Bazel still contains a limited version of pkg_tar but its feature set is frozen. Any new capabilities will be added here.