Update SRCREV for agl-compositor

Update SRCREV for agl-compositor

This brings up two major bits of functionality: the introduction of the
agl-shell-desktop protocol, which should be used by regular
application(s) to activate/switch other to other applications, and
the introduction of the policy API and with it, a default allow-all
kind of policy engine.

In more details, the following changes have been included:

- fcd71e034d378921e layout: Mark activated surface by default
- 1ee1bff64338dede1 desktop: Remove the active surface only if matches the one being displayed
- 0e66ee13b73e3ca21 meson.build: Increase the build version of agl-compositor
- 721d4d4f73e5d30ce README.md: Start adding some light documentation on the policy part
- 0a932bc7d66b062e6 layout: Allow by default to activate the application
- 58a3fe5c292349916 policy-default: Install a default policy engine
- 98457c49f5d777e40 policy: Init policy framework API
- fe3358fa9b560a43e ivi-compositor: Use the helpers for array length
- 6491e204fd4a9bd2d meson.build: Do another agl-compositor version bump
- 72aa326d8f54ad75c meson.build: Install agl-shell-desktop extension
- 786f91bd280b83049 protocol: Advertise the applications to regular clients
- a35a7f2e5cc20bd40 protocol: Add agl-shell-desktop protocol

This patch also installs the agl-shell-desktop XML file.

Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Change-Id: Icaec7e375242a0266383523806e5eca40d75b652