orderfile: Filter out $-symbols in orderfile

Orderfile generated from the Arm Chrome contains $x.NNN symbols.
This causes linker to silently drop the orderfile.

BUG=b:270758741
TEST=unit test

Change-Id: If93b8d3fa71e9a1b8e120e51524033b2ebc0f581
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/4321427
Reviewed-by: George Burgess <gbiv@chromium.org>
Commit-Queue: Denis Nikitin <denik@chromium.org>
Tested-by: Denis Nikitin <denik@chromium.org>
2 files changed