kselftests/net: add missed SRv6 tests

When generating the selftests to another folder, the SRv6 tests are
missing as they are not in Makefile, e.g.

  make -C tools/testing/selftests/ install \
      TARGETS="net" INSTALL_PATH=/tmp/kselftests

Fixes: 03a0b567 ("selftests: seg6: add selftest for SRv6 End.DT46 Behavior")
Fixes: 2195444e ("selftests: add selftest for the SRv6 End.DT4 behavior")
Fixes: 2bc03553 ("selftests: add selftest for the SRv6 End.DT6 (VRF) behavior")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tools/testing/selftests/net/Makefile

@@ -30,6 +30,9 @@ TEST_PROGS += ioam6.sh
 TEST_PROGS += gro.sh
 TEST_PROGS += gre_gso.sh
 TEST_PROGS += cmsg_so_mark.sh
+TEST_PROGS += srv6_end_dt46_l3vpn_test.sh
+TEST_PROGS += srv6_end_dt4_l3vpn_test.sh
+TEST_PROGS += srv6_end_dt6_l3vpn_test.sh
 TEST_PROGS_EXTENDED := in_netns.sh setup_loopback.sh setup_veth.sh
 TEST_GEN_FILES =  socket nettest
 TEST_GEN_FILES += psock_fanout psock_tpacket msg_zerocopy reuseport_addr_any