use else directive #3676

Job	Run time
byo-crypto	2m 58s
clang-sanitizers (,thread)	18m 38s
downstream	16m 50s
clang-sanitizers (,address,undefined)	17m 57s
linux-compat (manylinux1-x64)	16m 26s
linux-compat (manylinux1-x86)	17m 36s
linux-compiler-compat (clang-3)	16m 23s
linux-compat (manylinux2014-x64)	15m 13s
linux-debug	17m 0s
linux-compiler-compat (clang-6)	17m 31s
linux-shared-libs	16m 49s
linux-compat (manylinux2014-x86)	15m 52s
linux-compiler-compat (clang-8)	18m 31s
linux-compat (al2-x64)	15m 0s
linux-compiler-compat (clang-9)	17m 19s
linux-compiler-compat (clang-10)	17m 43s
macos	16m 36s
macos-x64	19m 3s
linux-compiler-compat (clang-11)	17m 6s
linux-compiler-compat (gcc-4.8)	16m 21s
windows	4m 6s
linux-compiler-compat (gcc-5)	16m 23s
windows-app-verifier	4m 39s
windows-shared-libs	4m 0s
linux-compiler-compat (gcc-6)	16m 23s
linux-compiler-compat (gcc-7)	16m 21s
windows-vc14 (x86)	3m 57s
linux-compiler-compat (gcc-8)	16m 59s
windows-vc14 (x64)	4m 2s
	6h 53m 42s

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