Enhance Application templates with Build Types for "Debug" and "Coverage"

Close for FF RC2

You can use the following build type with the app-templates : COVERAGE (previously CCOV), PROFILING, DEBUG, and RELEASE.

Here is the default compile options and associate profile compile options:
-Wall
-Wextra
-Wconversion
-Wno-unused-parameter
-Wno-sign-compare
-Wno-sign-conversion
-Werror=implicit-function-declaration
-ffunction-sections
-fdata-sections
-fPIC
-Werror=maybe-uninitialized

COVERAGE: -g --coverage
PROFILING: -g -O0 -pg -Wp,-U_FORTIFY_SOURCE
DEBUG: -g -ggdb -Og -D_FORTIFY_SOURCE=2
RELEASE: -O2 -D_FORTIFY_SOURCE=2

Also the widget generated is suffixed with the build type except for RELEASE.

My bad, forgot to refer to gerrit review 14963

A build type CCOV is already making the job but can be improved and be more visible.

Sorry, I accidentally assigned this issue to me : Re-assigned to @Stephane Desneux