Changes

Optionally integrate ccache to speed up oi-userland (re-)builds

* Allow use of makefile of environment value CCACHE_DISABLE=true to override the use of ccache for this particular build.
* Report initial setting of the detected CCACHE value (if not empty) when processing the shared-macros Makefile.
* ccache make-rules : assign SOURCE_DIR as CCACHE_BASEDIR value to speed up relocated builds of same code too.
* ccache README : mention how to enable ccache
 (commit: c5572a4)

Initial commit of augeas tools version 1.4.0
 (commit: 9087dcd)

Split off delivery of "charset.alias" files from the bulk of glib2 packaging

* Both glib2 and augtools try to deliver the charset.alias files with equivalent contents. Splitting them off into a separate package allows not so heavy dependencies when just one product is desired.
 (commit: bf07f8c)