[GBL] Add buffer overlapping check

Add itetools crate. It is used in testing.
Add 'is_overlap()' function to check provided buffers validity.

Bug: 312608785
Test: ./tools/bazel test @gbl//tests --extra_toolchains=@gbl//toolchain:all --verbose_failures
Change-Id: Ia09b5256c0be5fac9719c26fa97956c15dd4cbbe
6 files changed
tree: 3fdb846dbfe31a3b3685bd4bc22844f2941758ef
  1. gbl/
  2. libxbc/
  3. vts/
  4. .clang-format
  5. .gitignore
  6. BUILD
  7. LICENSE
  8. OWNERS