tree bb9f2e3f85c91ec83e9c582bb5d07184af5ae894
parent bf7c07b1b7ac7ae5c8dc85b2fc09496c0403c25c
author Nick Maniscalco <maniscalco@google.com> 1527273028 -0700
committer Nick Maniscalco <maniscalco@google.com> 1534287031 -0700

[go][syscalls] Make zx.Time and zx.Duration signed types

This change is part of a hard transition.

Zircon's C time types, zx_time_t and zx_duration_t, are now signed.
Update Go's to match.

Update TimensecInfinite from UINT64_MAX to INT64_MAX to mirror
ZX_TIME_INFINITE.

Test: CQ; built and ran topaz system on Eve

ZX-2100 #comment

Change-Id: I8e869abefc5496ac6f18fb13cc63845a7da54e47