usrsctp: add CVE_VERSION to correctly check for CVEs

The current version of usrsctp is not a release so cve-check
is not able to find the product version. CVE_VERSION is now set
to 0.9.3.0  that is the nearest version in the past starting from
the revision we have.
This is done because we don't have the complete 0.9.4.0 release.

Signed-off-by: Davide Gardenal <davide.gardenal@huawei.com>

meta-networking/recipes-protocols/usrsctp/usrsctp_git.bb

@@ -23,3 +23,5 @@ PACKAGECONFIG[inet] = "--enable-inet,--disable-inet,"
 PACKAGECONFIG[inet6] = "--enable-inet6,--disable-inet6,"
 
 EXTRA_OECONF += "--disable-debug"
+
+CVE_VERSION = "0.9.3.0"