llvm_tools: uprev ebuilds for LLVM roll CLs

Currently update_chromeos_llvm_hash.py uprevs ebuild files by increasing
the -r*.ebuild by 1. This patch renames the ebuild files with the new
SVN reversion and date for LLVM roll CLs.

BUG=chromium:1041590

TEST=local tests.

Change-Id: I209191f7d34594010914afb54d4c346e3f13c6fa
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/2139094
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Tested-by: Jian Cai <jiancai@google.com>
3 files changed