pts/seccomp: adjust build to include test in -eng

Since the autotests are server-side only right now, we need to include
test binaries on the -eng images. This adjusts the seccomp PTS to do that.

Bug: 24619824

Change-Id: I3c634eb1fbdcf49c1072e9ae59af88079947e678
Signed-off-by: Kees Cook <keescook@google.com>
diff --git a/pts/seccomp/Android.mk b/pts/seccomp/Android.mk
index 5d14e8a..7ce579f 100644
--- a/pts/seccomp/Android.mk
+++ b/pts/seccomp/Android.mk
@@ -16,7 +16,7 @@
 
 include $(CLEAR_VARS)
 
-LOCAL_MODULE := seccomp_bpf
+LOCAL_MODULE := seccomp_bpf_test
 
 # Ignore kernel-isms.
 LOCAL_CFLAGS += \
@@ -24,8 +24,10 @@
 	-Wno-unused-parameter \
 	-Wno-missing-field-initializers
 
-# Don't include this package in any configuration by default.
-LOCAL_MODULE_TAGS := optional
+# Include this in Brillo -eng builds only (for automated testing).
+ifdef BRILLO
+LOCAL_MODULE_TAGS := eng
+endif
 
 LOCAL_SRC_FILES := seccomp_bpf.c