Add *_remote_toolchain_inputs files for OpenJDK 21

Add *_remote_toolchain_inputs files for OpenJDK 21 so that RBE
can populate the toolchain dependencies.

Bug: 302395149
Test: ./update.sh 11150980
Change-Id: I6e5010e30d975312949f2d420daba057a55739bb
2 files changed
tree: f6d0428daf938efed861752ebb31377037293631
  1. linux-x86/
  2. BUILD.bazel
  3. manifest.xml
  4. update.sh