[generic-arm-test] Set TEST_BUILD and add appmgmt syscall tests

The application management syscall, register_app, is only available in
test builds (TEST_BUILD := true).

Bug: 115420908
Change-Id: I9d647093a5604f1be474410811737129f059247b
diff --git a/project/generic-arm-test-inc.mk b/project/generic-arm-test-inc.mk
index d798d48..439539f 100644
--- a/project/generic-arm-test-inc.mk
+++ b/project/generic-arm-test-inc.mk
@@ -16,6 +16,8 @@
 include project/generic-arm-inc.mk
 include trusty/kernel/kerneltests-inc.mk
 
+TEST_BUILD := true
+
 TRUSTY_BUILTIN_USER_TASKS += \
 	trusty/user/app/keymaster/device_unittest \
 	trusty/user/app/sample/app-mgmt-test/boot-start-srv \
@@ -23,9 +25,17 @@
 	trusty/user/app/sample/app-mgmt-test/never-start-srv \
 	trusty/user/app/sample/app-mgmt-test/port-start-srv \
 	trusty/user/app/sample/app-mgmt-test/restart-srv \
+	trusty/user/app/sample/app-mgmt-test/syscalls-test/aux \
+	trusty/user/app/sample/app-mgmt-test/syscalls-test/builtin \
+	trusty/user/app/sample/app-mgmt-test/syscalls-test/main \
 	trusty/user/app/sample/ipc-unittest/main \
 	trusty/user/app/sample/ipc-unittest/srv \
 	trusty/user/app/sample/libc-test \
 	trusty/user/app/sample/storage-unittest \
 	trusty/user/app/sample/timer \
 
+TRUSTY_LOADABLE_USER_TASKS += \
+	trusty/user/app/sample/app-mgmt-test/syscalls-test/main/test_apps/duplicate_port \
+	trusty/user/app/sample/app-mgmt-test/syscalls-test/main/test_apps/load_start \
+	trusty/user/app/sample/app-mgmt-test/syscalls-test/main/test_apps/port_start \
+