Make the default the 4 tab space version.
Add a link to the 2 space version for libbacktrace.
The only other difference between the 4 space and 2 space tab version
is that the 2 space tab version allows short functions on a single line.
This is for things like constructors, short destructors, or accessor
functions. I believe this is closer to the Google C++ style guide.
Bug: 36046320
Test: NA
Change-Id: Ida08db18902eeb101f42869dd5590182529d54ef
The style file .clang-format is copied from adb/.clang-format.
Each sub folders still can have different style by adding their own
.clang-format because git-clang-format uses the style file located
in one of the parent directories of the *source file*.
Also see the following link for previous discussions:
https://android-review.googlesource.com/#/c/340106
Bug: 36046320
Test: repo upload, checks pre-submit fails when the uploading commit
doesn't meet the style
Change-Id: I94369af197da1ccce581bbd861c8737f6a197429
