Makefile cleanups for consistency between packages.

Placed libsysrepo in Libraries instead of Utilities.

Removed InstallDev as it is implied by CMAKE_INSTALL.

Added .patch at the end of patch files.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

- Add PKG_LICENSE_FILES
- Refresh patches
- Use better URL

Signed-off-by: Josef Schlehofer <pepe.schlehofer@gmail.com>

Patch includes updates to packages:
netopeer2: update to version 0.4.0
sysrepo: update to 0.7.0
libnetconf2: update to 0.9.15
libyang: update to 0.13.46

Signed-off-by: Mislav Novakovic <mislav.novakovic@sartura.hr>