Correct iOS device build for latest Xcode beta.
Stop referring to dylib directly, and instead use the linker shortcut.
With the latest Xcode beta, some dylibs are now named .tbd, so
referencing the actual path for simulator (dylib) and device (tbd) would
make for a very complicated build file.
Using the linker short name bypases all of that.
BUG=499098
TBRs for small iOS only gyp changes.
TBR=scottmg@chromium.org (libxml)
TBR=michaeln@chromium.org (sqlite)
Review URL: https://codereview.chromium.org/1179573004
Cr-Commit-Position: refs/heads/master@{#333978}
6 files changed
