Include e_os.h for missing struct timeval #894

Job	Run time
address_ub_sanitizer	18m 37s
basic_clang	8m 36s
basic_gcc	9m 7s
check_docs	1m 11s
check_update	1m 42s
check-ansi	4m 24s
enable_brotli_and_asan_ubsan	14m 17s
enable_brotli_and_zstd_dynamic	8m 29s
enable_brotli_dynamic	9m 52s
enable_non-default_options	7m 11s
enable_zstd_dynamic	8m 16s
enable_zstd_and_asan_ubsan	13m 23s
memory_sanitizer	19m 27s
fips_and_ktls	8m 54s
minimal	3m 33s
no-legacy	8m 43s
no-deprecated	8m 44s
non-caching	24m 23s
no-shared (ubuntu-latest)	7m 9s
threads_sanitizer	8m 10s
no-shared (macos-latest)	9m 43s
buildtest	10m 14s
enable-tfo (ubuntu-latest)	8m 44s
enable-tfo (macos-latest)	12m 33s
external-test-cf-quiche	7m 21s
external-test-pyca (1.51.0, 3.9)	10m 48s
external-tests	18m 46s
legacy	7m 8s
out-of-source-and-install (ubuntu-latest)	11m 28s
out-of-source-and-install (macos-latest)	17m 15s
	5h 8m 8s

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