imx-parser: add install hooks to fix libraries path

By default, all the libraries are installed under /usr/lib/imx-mm
which causes problems at runtime.

[Peter: drop -mindepth/-maxdepth, add comment explaining why this is done]
Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>