package.h: Update PACKAGE_COPYRIGHT_YEAR to 2018
package.h: Update PACKAGE_COPYRIGHT_YEAR to 2018

Bug: crashpad:
Change-Id: I64d76604c683b53524b496a5929382c490fe2dc9
Reviewed-on: https://chromium-review.googlesource.com/1149157
Reviewed-by: Mark Mentovai <f1b5a91d4d6ad523f2610114591c007e75d15084@chromium.org>
Commit-Queue: Ryan Tseng <2190fe9a39b4920ec7bd59c848ec5cccd163056f@chromium.org>

chromium/crashpad,chromium/crashpad,chromium/crashpad