Add the nativesdk-cmake-apps-module-doc package to the SDK

Add the nativesdk-cmake-apps-module-doc package to the SDK

This is required to have the sample cmake files present in the SDK.
These are mentioned in the cmake-apps-module documentation.

Bug-AGL: SPEC-3688
Signed-off-by: Jan-Simon Möller <jsmoeller@linuxfoundation.org>
Change-Id: I54012c9ef5c5c55b24d05789df852ba2a3b947c3
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/25559
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-boot-test: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>