elf: Use compiler macros in crashpad info size test note
elf: Use compiler macros in crashpad info size test note

Bug: crashpad:30
Change-Id: If5bdd15dfc050ef57df0e3b59dd6a5e74d4a9b22
Reviewed-on: https://chromium-review.googlesource.com/972367
Reviewed-by: Mark Mentovai <f1b5a91d4d6ad523f2610114591c007e75d15084@chromium.org>

chromium/crashpad,chromium/crashpad,chromium/crashpad