Include linux/net.h in android unit tests for socketcall declaration.

Author: de-vri-es

libc-test/build.rs

@@ -1425,6 +1425,7 @@ fn test_android(target: &str) {
                 "linux/magic.h",
                 "linux/memfd.h",
                 "linux/module.h",
+                "linux/net.h",
                 "linux/net_tstamp.h",
                 "linux/netfilter/nfnetlink.h",
                 "linux/netfilter/nfnetlink_log.h",