Fix exception location in z7 test on older bots
Fix exception location in z7 test on older bots

The cdb on the x86 bot displays relative to exported DLL symbols, but
newer ones don't seem to, so it's either:

  z7_test!CrashMe+0xe

or

  z7_test+0x100e

https://build.chromium.org/p/client.crashpad/builders/crashpad_win_x86_rel/builds/110/steps/run%20tests/logs/stdio

R=mark@chromium.org
BUG=crashpad:47

Review URL: https://codereview.chromium.org/1430633006 .

chromium/crashpad,chromium/crashpad,atom/crashpad,atom/crashpad,chromium/crashpad,atom/crashpad