Brotli: Don't leave errors behind if loading library failed. #20

Job	Run time
basic_clang	5m 13s
basic_gcc	5m 4s
check_docs	56s
check_update	2m 4s
check-ansi	2m 26s
minimal	2m 32s
no-deprecated	4m 46s
no-shared-ubuntu	3m 47s
self-hosted (freebsd-13.2)	1s
self-hosted (ubuntu-arm64-22.04)	1s
address_ub_sanitizer	10m 7s
enable_non-default_options	4m 2s
full_featured	5m 30s
fuzz_tests	2m 55s
memory_sanitizer	19m 15s
non-caching	14m 50s
no-shared-macos	6m 45s
threads_sanitizer	5m 29s
external-test-cf-quiche	3m 32s
external-test-pyca (1.51.0, 3.9)	8m 14s
external-tests	11m 31s
legacy	3m 59s
no-legacy	5m 3s
out-of-readonly-source-and-install-macos	11m 49s
out-of-readonly-source-and-install-ubuntu	6m 59s
	2h 26m 50s

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