fix flag #2765

Job	Run time
linux-byo-crypto	2m 42s
linux-compiler-compat (clang-3)	7m 44s
linux-compiler-compat (clang-6)	6m 53s
downstream	6m 36s
clang-sanitizers (,thread)	7m 34s
linux-compiler-compat (clang-8)	7m 52s
linux-compat (manylinux1-x64)	6m 2s
linux-compiler-compat (clang-9)	7m 15s
clang-sanitizers (,address,undefined)	7m 4s
linux-compat (manylinux1-x86)	6m 19s
linux-compiler-compat (clang-10)	7m 19s
linux-debug	6m 9s
linux-compat (manylinux2014-x64)	5m 53s
linux-compiler-compat (clang-11)	6m 47s
linux-compat (manylinux2014-x86)	6m 35s
linux-shared-libs	6m 30s
linux-compiler-compat (gcc-4.8)	6m 28s
linux-compat (fedora-34-x64)	5m 27s
linux-compiler-compat (gcc-5)	6m 30s
linux-compat (opensuse-leap)	6m 38s
linux-compiler-compat (gcc-6)	6m 22s
linux-compat (rhel8-x64)	6m 23s
freebsd	6m 31s
linux-compiler-compat (gcc-7)	5m 46s
linux-compat (al2-x64)	5m 56s
linux-compiler-compat (gcc-8)	6m 42s
macos (-DAWS_USE_APPLE_NETWORK_FRAMEWORK=ON)	2m 18s
macos-debug (-DAWS_USE_APPLE_NETWORK_FRAMEWORK=ON)	2m 11s
macos (-DAWS_USE_APPLE_NETWORK_FRAMEWORK=OFF)	2m 54s
macos-x64	2m 44s
macos-debug (-DAWS_USE_APPLE_NETWORK_FRAMEWORK=OFF)	2m 13s
windows	3m 31s
windows-app-verifier	4m 35s
windows-debug	3m 48s
windows-shared-libs	3m 57s
windows-vc14 (x86)	2m 54s
openbsd	10m 9s
windows-vc14 (x64)	3m 28s
	3h 32m 39s

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