package/libnids: new package

package/libnids: new package

Libnids is a C based networking library, part of networking intrusion
detection tools.  It can watch network traffic & provide informations.

Signed-off-by: Guillaume W. Bres <guillaume.bressaix@gmail.com>
[Thomas:
 - only needs libpcap as a mandatory dependency
 - add patch to fix libpcap detection
 - pass install_root= at installation time
 - drop glibc dependency, it builds fine with uclibc]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>