Empty file fix #3089

Job	Run time
byo-crypto	2m 32s
clang-sanitizers (,thread)	16m 18s
downstream	16m 35s
clang-sanitizers (,address,undefined)	16m 0s
linux-compat (manylinux1-x64)	16m 11s
linux-compiler-compat (clang-3)	16m 13s
linux-compat (manylinux1-x86)	16m 37s
linux-compiler-compat (clang-6)	15m 57s
linux-compat (manylinux2014-x64)	16m 6s
linux-compiler-compat (clang-8)	16m 14s
linux-compat (manylinux2014-x86)	15m 59s
linux-compiler-compat (clang-9)	16m 12s
linux-debug	16m 24s
linux-compat (al2-x64)	15m 47s
linux-compiler-compat (clang-10)	16m 12s
linux-compiler-compat (clang-11)	16m 15s
linux-compiler-compat (gcc-4.8)	15m 59s
linux-compiler-compat (gcc-5)	16m 14s
linux-shared-libs	15m 22s
osx	19m 2s
linux-compiler-compat (gcc-6)	16m 13s
linux-compiler-compat (gcc-7)	16m 13s
windows	18m 32s
windows-app-verifier	29m 46s
linux-compiler-compat (gcc-8)	16m 12s
windows-shared-libs	18m 40s
windows-vc14 (x86)	16m 52s
windows-vc14 (x64)	16m 57s
	7h 41m 34s

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