Add missing build/build_config.h include
Add missing build/build_config.h include

Change-Id: I1fa215d0d7c3925c27cf45702634269f4f6f2322
Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/1684438
Reviewed-by: Mark Mentovai <f1b5a91d4d6ad523f2610114591c007e75d15084@chromium.org>
Commit-Queue: Vlad Tsyrklevich <3ea22bafc354516b4394ca6e546f643c45fca91c@chromium.org>

chromium/crashpad,chromium/crashpad,chromium/crashpad