Add crash manager API

Add crash manager API

Privileged processes can send a D-Bus method call to create report of
any living process. Signature is (iss):

- INT    (in) PID
- STRING (in) dump reason
- STRING (out) report path

There is a library libcrashservice that sends the D-Bus method call.

A function signature is:

    int livedump_pid(pid_t pid,
                     const char *dump_reason,
                     char *report_path);

Change-Id: Id8528bdbaac517d4b5fc649821368e0ff020862f