[trusty][libc] more c++ support for keymaster

Added following symbols.
__aeabi_atexit
__cxa_pure_virtual
__dso_handle

Change-Id: I8ccb438edc425e19ecbaaee794d04404d712ae4d
3 files changed
tree: 2ae82d854a69c460b8c5a546abe8ecec045d7e79
  1. include/
  2. lib/