Use latest version of conf.d/app-templates submodule.

Use latest version of conf.d/app-templates submodule.

Changes of conf.d/app-templates:

(332f377 - Romain Forlot) Be able to overwrite BUILD_TYPE using CLI
(1ec7531 - Romain Forlot) Use CACHE variable for other common CMAKE variable
(0880356 - Romain Forlot) Fix:: wrong wgt using RELEASE BUILD TYPE
(eec9f07 - Romain Forlot) Fix: SYSROOT location detection... Wrong test.
(291aa4e - Romain Forlot) Change the default debug compilation options.
(22a2cbf - Romain Forlot) Clearer coverage compilation options configuration
(aa68dbd - Romain Forlot) Don't overwrite the autobuild script if it exists
(a13e7b9 - Romain Forlot) Disable the in-tree build method.
(51026d2 - Romain Forlot) Detect Yocto as OS distribution

Change-Id: If5274a0be2a00a0166be8f5c3b6d7a517da821f5
Signed-off-by: Loïc Collignon <loic.collignon@iot.bzh>