[pkg-go] Bug#918515: golang-github-aead-chacha20 FTBFS: relocation target runtime.support_avx not defined

[Adrian Bunk]

Source: golang-github-aead-chacha20
Version: 0.0~git20180214.c8d2937-1
Severity: serious
Tags: ftbfs

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/golang-github-aead-chacha20.html

...
   dh_auto_test -O--buildsystem=golang
	cd obj-x86_64-linux-gnu && go test -vet=off -v -p 16 github.com/aead/chacha20 github.com/aead/chacha20/chacha
# github.com/aead/chacha20.test
github.com/aead/chacha20/chacha.supportsAVX2: relocation target runtime.support_avx not defined
github.com/aead/chacha20/chacha.supportsAVX2: relocation target runtime.support_avx2 not defined
FAIL	github.com/aead/chacha20 [build failed]
# github.com/aead/chacha20/chacha.test
github.com/aead/chacha20/chacha.supportsAVX2: relocation target runtime.support_avx not defined
github.com/aead/chacha20/chacha.supportsAVX2: relocation target runtime.support_avx2 not defined
FAIL	github.com/aead/chacha20/chacha [build failed]
dh_auto_test: cd obj-x86_64-linux-gnu && go test -vet=off -v -p 16 github.com/aead/chacha20 github.com/aead/chacha20/chacha returned exit code 2
make: *** [debian/rules:4: build] Error 2