meson.build: Make building qrtr-ns opt-in

It's been moved to the kernel since forever..

Signed-off-by: Konrad Dybcio <[email protected]>

lib: Fix endian handling and add new/del server

Fix up the handling of endian translation and add support for decoding
new and del server messages.

Signed-off-by: Bjorn Andersson <[email protected]>

cfg: Request and check return value

Request the return value of the operation from the kernel and check if
it's an error, to inform the user about e.g. not having sufficient
permission.

Signed-off-by: Bjorn Andersson <[email protected]>

Merge pull request #1 from ndechesne/build

Various Makefile improvements