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

build/build_config.h sometimes includes other headers which aren't
appropriate for .S files.

Bug: crashpad:30
Change-Id: Ie039e08599137d157c60482c72d6eba6a5566ef5
Reviewed-on: https://chromium-review.googlesource.com/966876
Commit-Queue: Joshua Peraza <f5809a5e35ec7e1bd0e25cb0a0b68bb433cf6f17@chromium.org>
Reviewed-by: Mark Mentovai <f1b5a91d4d6ad523f2610114591c007e75d15084@chromium.org>

chromium/crashpad,chromium/crashpad,chromium/crashpad