webos-filesystem-paths: Add developer mode locations

:Release Notes:
Add these variables:
  webos_developerdir
  webos_sysbus_devpubservicesdir
  webos_sysbus_devprvservicesdir
  webos_sysbus_devpubrolesdir
  webos_sysbus_devprvrolesdir

:Detailed Notes:
Update the commentary on when various locations are erased.

:Testing Performed:
The output from
  $ make BBFLAGS=-e cjson | grep 'export webos.*_dev' | sort
shows that the variables have been set correctly.

:QA Notes:

:Build Notes:
This commit invalidates all shared state.

:Issues Addressed:
[GF-38331] luna-service2 must also search /var/palm/ls2-dev for roles
           and services

Open-webOS-DCO-1.0-Signed-off-by: Herb Kuta <herb.kuta@lge.com>
Change-Id: I2ec1660b3f6284e058bff1c9fa9ca15a7c15c819
Reviewed-on: https://g2g.palm.com/3591
Tested-by: Herb Kuta <herb.kuta@lge.com>
Reviewed-by: Susan Montooth <susan.montooth@lge.com>
webos-image: cmake-modules-webos-native=18,1.0.0~rc6

:Release Notes:
Add  WEBOS_INSTALL_* variables for additional folders for luna-service2
role-files.

:Detailed Notes:
When apps with services are installed into /media/developer by
appinstalld, service and role files are generated in
/var/palm/ls2-dev (just as they are generated in /var/palm/ls2 for
downloaded services).

To facilitate this, new WEBOS_INSTALL_* variables are defined.

    WEBOS_INSTALL_SYSBUS_DEVPUBSERVICESDIR
    WEBOS_INSTALL_SYSBUS_DEVPRVSERVICESDIR
    WEBOS_INSTALL_SYSBUS_DEVPUBROLESDIR
    WEBOS_INSTALL_SYSBUS_DEVPRVROLESDIR

cmake-modules-webos:
f247b8a Add additional folders for ls2 role-files

:Testing Performed:
A clean build is sufficient as nothing uses these variables yet.

:QA Notes:

:Issues Addressed:
[GF-38331] luna-service2 must also search /var/palm/ls2-dev for roles
           and services
[GF-40721] CCC: cmake-modules-webos-native=18,1.0.0~rc6

Open-webOS-DCO-1.0-Signed-off-by: Keith Derrick <keith.derrick@lge.com>
Change-Id: Idd1976dc1b34828bf53b19a875a883f402b4fc0a
Reviewed-on: https://g2g.palm.com/3580
Reviewed-by: Herb Kuta <herb.kuta@lge.com>
Tested-by: Herb Kuta <herb.kuta@lge.com>
Reviewed-by: Susan Montooth <susan.montooth@lge.com>