* build: fix native_mksnapshot build
When we changed our electron_mksnapshot_zip target to include the v8_context_snapshot_generator, this dependency made the `run_mksnapshot` target run which was trying to run an arm/arm64 binary on x64 hardware.
Don't use custom build args for native_mksnapshot as they are not needed
* Added comment on why snapshot_blob.bin is skipped on arm/arm64
* chore: remove duplicate and un-needed files from dist zips
* Strip chromedriver binaries
Also, fix path for files to skip
* Don't strip mksnapshot for now
Mksnapshot needs special handling for arm/arm64 because there is both an x86 and arm/arm64 binary in those cases.
Make sure certain paths/files don't make it into the dist zip
Don't build the content shell test_runner
Make sure libffmpeg.dylib gets put in the right place
Run verify-ffmpeg on Mac builds
Add ffmpeg build to VSTS
* build: [gn] add distributable zip target
* build: update the CircleCI config
- enable debug and testing builds on Mac
- run Mac release builds nightly
- run test for Mac release builds
- use shared build machines configs
* Add resources dir to zip on non mac platforms.
