Fix old macOS build.

Even the "new" macOS build bots (running 10.13) with my attempted
LC_ALL=C workaround are failing to build the new GNU Make.

  sed: RE error: illegal byte sequence

The error is because of the 'ä' in "Klaus Kämpf", so as a workaround
let's just mangle that into ASCII for now.

Bug: http://b/153310680
Test: suck it and see
Change-Id: I973e0a29c10a129062dff8d902ac4322ba90f561
1 file changed