spdk.unittest.mk includes spdk.app.mk, but some unit test
Makefiles include both spdk.unittest.mk and spdk.app.mk,
meaning spdk.app.mk gets included twice. Fix that.
This hasn't been an issue because spdk.app.mk currently
only includes variables - but no rules.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I23d39e8084f79442fb06ae9b5a6a68d6134adff4
Reviewed-on: https://review.gerrithub.io/434281
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Chandler-Test-Pool: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>