package/netcat: set NETCAT_CPE_ID_VALID
cpe:2.3:a:netcat_project:netcat is indeed the right CPE identifier for
this package, as can be seen from:
https://nvd.nist.gov/products/cpe/search/results?namingFormat=2.3&keyword=cpe%3A2.3%3Aa%3Anetcat_project%3Anetcat
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>