[pkg-go] Bug#876924: golang-github-facebookgo-ensure FTBFS with Go 1.9

[Adrian Bunk]

Source: golang-github-facebookgo-ensure
Version: 0.0~git20160127.0.b4ab57d-1
Severity: serious

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

...
--- FAIL: TestExtras (0.00s)
	ensure.go:65:         golang-github-facebookgo-ensure_0.0~git20160127.0.b4ab57d-1/obj-x86_64-linux-gnu/src/github.com/facebookgo/ensure/common_test.go:29 (*capture).Equal
		golang-github-facebookgo-ensure_0.0~git20160127.0.b4ab57d-1/obj-x86_64-linux-gnu/src/github.com/facebookgo/ensure/ensure_test.go:42 TestExtras
		expected these to be equal:
		ACTUAL:
		(string) (len=194) "ensure_test.go:32: unexpected error: foo\n(map[string]int) (len=1) {\n (string) (len=6) \"answer\": (int) 42\n}\n(string) (len=3) \"baz\"\n(int) 43\n(float64) 44.45\n(ensure_test.typ) {\n Answer: (int) 46\n}"
		
		EXPECTED:
		(string) (len=194) "ensure_test.go:41: unexpected error: foo\n(map[string]int) (len=1) {\n (string) (len=6) \"answer\": (int) 42\n}\n(string) (len=3) \"baz\"\n(int) 43\n(float64) 44.45\n(ensure_test.typ) {\n Answer: (int) 46\n}"