PostgreSQL: fix a bug in init.d script

Without this change the return code of 'status' is wrong.
Changes.md: Add PostgreSQL bugfix of init.d script

Without this change the return code of 'status' is wrong.

[ci skip]
Add links to Trusty development branch

[ci ckip]
Bump minor version of PostgreSQL cookbook

Semantic version due to a minor bug fix,
see 9ac2a2f966a22570f56e15bd2b0288410d5f0e2d
Android SDK: pre-install build-tools 21.1.1

I removed former versions 20.0.0 (and transient 21.0.2).
As agreed in https://github.com/travis-ci/travis-cookbooks/pull/360,
we only pre-install the "latest" build-tools version
Android SDK: remove inexistent 'android-support'

Revert 9397bd1f3236ab5081b5edfb474239cd25f400ce.
The extra-android-support component was already part of preinstallation
list.
Android SDK: minor cleanup

Remove a forgotten TODO that initially cames via
https://github.com/travis-ci/travis-cookbooks/pull/337
and d6773f9aa29cc29c8ebdb94bfeb4fc9bf1fa992a
Update changelog (Android SDK components updated)

[ci skip]
Always pre-install latest Android SDK tools

Related to https://github.com/travis-ci/travis-ci/issues/2848

@BanzaiMan we should extend https://github.com/travis-ci/system_info to store
the Android SDK version.
Merge pull request #403 from travis-ci/gc-android-23.0.5

Always pre-install latest Android SDK tools
Split system_info into smaller pieces
Merge branch 'master' into ha-feature-vagrant