[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
1 file changed
tree: 2d46f5e87742dd40856b6cf652bed49513ebb62b
  1. .clang-format
  2. LICENSE
  3. PREUPLOAD.cfg
  4. project/