Fix handling of the "0:" label in arm-xlate.pl #33

Job	Run time
basic_clang	7m 8s
basic_gcc	8m 54s
check_update	2m 1s
check-ansi	4m 31s
minimal	4m 33s
no-deprecated	8m 43s
non-caching	24m 35s
no-shared (ubuntu-latest)	5m 29s
no-shared (macos-latest)	8m 6s
address_ub_sanitizer	14m 51s
enable_brotli_and_asan_ubsan	16m 41s
check_docs	1m 10s
enable_brotli_and_zstd_dynamic	8m 31s
enable_brotli_dynamic	9m 9s
enable_non-default_options	8m 30s
enable_zstd_and_asan_ubsan	16m 8s
enable_zstd_dynamic	8m 37s
fips_and_ktls	7m 39s
legacy	5m 37s
memory_sanitizer	18m 57s
no-legacy	7m 45s
threads_sanitizer	6m 19s
buildtest	9m 39s
enable-tfo (ubuntu-latest)	8m 5s
enable-tfo (macos-latest)	10m 1s
external-test-cf-quiche	8m 12s
external-test-pyca (1.51.0, 3.9)	10m 45s
external-tests	14m 15s
out-of-source-and-install (ubuntu-latest)	11m 9s
out-of-source-and-install (macos-latest)	16m 6s
	4h 52m 6s

Provide feedback