Fix format specifier warnings

This fixes 14 warnings that look like:

warning: format specifies type 'long' but the argument has type
'::google::protobuf::int64' (aka 'long long')

Using macros makes it easier to read IMO.

Bug: None
Test: mma. Warnings are gone.
Change-Id: I3e029437e7f5d1550dae29a18c05706be16eac65
1 file changed