Elaborate on "Google doesn't recommend ...".
Add note on updating the mirror (using standard repo sync).
Add initial version of script to create implibs for an Android release.
Dump as much as possible symbols info, let implib creator filter it.

Account for previous case of omitting data symbols - just dump everything,
let create-implibs filter it. Symbol address are pruned though, as they
may lead to spurious diffs between different builds.
Capture android-1.6_r1 shlib symbols.
Capture android-2.3.5_r1 shlib symbols.