[lib][syscall] update stubgen.py to support x86 64bit

add option "-a" to speicfy architure, available architure:
arm, x86_64, default architure is arm.

Change-Id: I972caba7da0ac4c887328b90c6622d4438c3c0cf
2 files changed
tree: 7ff4438bdf16ab0f5a44f1a787a572a92a5c2429
  1. app/
  2. include/
  3. lib/
  4. make/
  5. platform/
  6. target/
  7. AUTHORS
  8. LICENSE