Changes

lapd-over-datagram-user: fix printf format for timeval fields

Use inttypes.h and PRI* macros when printing struct timeval
members. This avoids format string mismatches and makes the
example code portable across architectures where time_t /
suseconds_t may differ in size.

No functional change intended.

Change-Id: I7067eae1132c604aff3b37e5dff06fadb0759cb6