Packages are often also installed in both the pre-install.d and
post-install.d phases. This patch expands the package-installs element
to support declarative package support for these phases in addition to
the existing support for install.d. The actual install/uninstall logic
is moved to common scripts under bin/ so that it can be reused across
the different phases.
Change-Id: Id51d0bbad232737fc8b5ffaf016dec50cd5b66c9
Adds a new element, package-installs, that provides an interface for
declarative package installs and uninstalls. Packages to install can be
added to an install.d/package-installs-<element-name> file. The set of
packages listed across such files are installed in a single transaction
at the beginning of install.d.
Prefacing the package name with a "-" indicates that the package should
be uninstalled at the end of the install.d phase. Again, the full set of
uninstalls are done in a single transaction.
An element providing a package-installs file should add package-installs
to its element-deps file.
Change-Id: I5b540388eff1079c8dee933b869463371481152b
