Auto merge of #916 - asajeffrey:magicleap-bin-permissions, r=jdm
Auto merge of #916 - asajeffrey:magicleap-bin-permissions, r=jdm

Don't remove execute permission from magicleap sdk files

Fixes build problems such as http://build.servo.org/builders/magicleap/builds/11
```
/Users/servo/magicleap/v0.17.0/tools/toolchains/bin/aarch64-linux-android-clang: Permission denied
```

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servo/saltfs,servo/saltfs