Resolves: MANGOH-2

Change-Id: Ic05fe83a720af7bb0fe5c5f45bfa9b09b7f52322

Change-Id: Ie34e504548ddf64b45aa2cfa2449467a9a90483a

Patch1:
Changed name of the variables.
Btw this is how it is all connected:

This enables Legato to build doxygen and include a link to a mainpage
from another project.
The other system must define the following

export EXTERNAL_DOXYGEN_DEFINE = EXTERNAL_DOXYGEN_DEFINE
export EXTERNAL_DOXYGEN_ROOT = $(PROJECTX_ROOT)/apps/WiFi
and it must also have a doxygen page called "external_proj_mainpage"


These defines are defined in targetDefs.projectx and will be read by CMake.

framework/doc/Cmakelist.txt:
EXTERNAL_DOXYGEN_DEFINE
EXTERNAL_DOXYGEN_ROOT
and sets
CMAKE_EXTERNAL_DOXYGEN_ROOT

They are then transfered into the soon to be preproccessed
doxygen config files :
framework/doc/doxygen.implementation.cfg.in
framework/doc/doxygen.user.cfg.in

These doxygen configuration files are preprocessed by CMake
and enables basic variable expansion.
Please note that doxygen variables are very restrictive
and only the ones set with the variable ENABLED_SECTIONS
in the config file are available.

This all enables the usage of conditional (similare to ifdef) usage to
include/exclude text. Currently all that is done is a link from the
Legato main page to the other projects page
Example:
@cond EXTERNAL_DOXYGEN_DEFINE
@subpage external_proj_mainpage <br>
@endcond

Change-Id: I8d9770dfef2d784a3221716e4a2a3fb725d9c90b

Patch 4:
  -rebase

Patch 3:
  -Jenkins CTO comment about review comment

Patch 2:
  -Added define for PA choice.

Patch 1:
  -Added wifiWebAp to list of apps to build for MangOH

Change-Id: Ifb8c5667371dedcb49875c21184d353a77ee0043

Change-Id: I5ccb08358743973b91eadee0c0f975c3ba74f667

patch 1:
- Added variable that will be transfered by cmake into doxygen to be used to test.
- please note that only  ENABLED_SECTIONS variables are visible to doxygen.
- doing "make docs" in legato, will now detect and bring MangOH into the doxygen.

Change-Id: I4e5aeee4ffbfdc541e8fcfba2b6f02f4143e06b3

patch 3:
removed trailing space

patch 2:
- added -

patch 1:
- when building legato, it will also build and integrate MangOH wifi
- note that MANGOH_WIFI_ROOT is set by the build

Change-Id: I06bee34525a8bb5ddbf2749dcd137b460b9d38ed

Change-Id: Iad5e5d21a041bc3c1c02ade87c8358a206666e9b

Patch 2:
 - Add targetDefs for mangOH
 - Tell git to ignore apps subdirectory

Patch 1:
 - Add mangOH sdef file

Change-Id: Ia75786b6e188d07b3abb89a91686d59145bbab8d

Change-Id: I7cb8bc3d5dab68ef72ca1a4c33061b2aa053bd56