Fix cfi-icall failure with use_system_libjpeg=true

JPEGImageReader::AllocateSampleArray() can call the function pointer
(*info_.mem->alloc_sarray) which can be set by the systems non-CFI
enabled libjpeg DSO when chromium is built with use_system_libjpeg=true.
Disable cfi-icall for that method.

Bug: 866290
Change-Id: I6d9bbf08c514d6d5f48ad34c3802c63419ed1223
Reviewed-on: https://chromium-review.googlesource.com/1155927
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Vlad Tsyrklevich <vtsyrklevich@chromium.org>
Cr-Commit-Position: refs/heads/master@{#579270}
2 files changed