Fix ndk-gdb and add --delay=<seconds> option.

Fix ndk-gdb to _not_ start the activity unless --start or --launch is used.

Add a new option --delay=<seconds> to change the wait delay between the
launch of an activity and its attachement with gdbserver. The default delay
is also changed from 1 to 2 seconds.

Document the system libraries update.

Change-Id: Ia7e8c47221e3741bdc2688e750dae366c5426e67
6 files changed