Merge pull request #2666 from huningxin/roll_v8

DEPS.xwalk: Roll v8-crosswalk (5b2efea -> f2bc708)
gyp: Cleanup dependency on re2.

- Stop always depending on it in xwalk_application_common.gypi, as it is
  only needed for Tizen.

- Remove dependency in xwalk_application.gypi now that the manifest
  handling files are in application/common/ and thus covered by
  xwalk_application_common.gypi.
Merge pull request #2676 from rakuco/gyp-cleanup-re2-dependency

gyp: Cleanup dependency on re2.
[Tizen] gyp: Move xmlsec detection to system.gyp.

This was the last remaining pkg-config call spread around random gyp
files. Move it to build/system.gyp with all the others and depend on the
"xmlsec" target in xwalk_application_common.gypi.
Fix build on Mac.

Add xdg_mime dependency where it's needed. Only Tizen uses this
library in common/manifest_handlers/tizen_app_control_handler.
Merge pull request #2677 from rakuco/gyp-move-xmlsec-check-to-system.gyp

[Tizen] gyp: Move xmlsec detection to system.gyp.
Merge pull request #2678 from darktears/master

Fix build on Mac.
Bump version to 11.39.258.0
DEPS.xwalk: Roll v8-crosswalk (f2bc708 -> 825a59c)

825a59c Merge pull request #64 from halton/out-of-range-compare
b16ccb6 Merge pull request #63 from huningxin/m39-load-store-pr
8352127 [Backport] Fix clang++ warnings on -Wtautological-constant-out-of-range-compare
96bb068 [SIMD.js] Implement SIMD128 data load and store APIs