travis: temp workaround for 'multiple //go:build comments' error by s…

…etting 'go 1.17' directive

Workaround dvyukov#313.

cmd/go should in theory pay attention to the version set in the 'go' directive when interpreting //go:build comments,

.travis.yml

@@ -68,8 +68,14 @@ script:
  - git clone --depth=1 https://github.com/thepudds/go-fuzz-corpus $GOPATH/src/github.com/dvyukov/go-fuzz-corpus
  - cd $GOPATH/src/github.com/dvyukov/go-fuzz-corpus/
  - cd png
+ # Create a small module to test the png example.
+ - go mod init github.com/dvyukov/go-fuzz-corpus/png
+ - go mod tidy
+ - go get -d github.com/dvyukov/go-fuzz/go-fuzz-dep
+ # TODO: temp workaround for 'multiple //go:build comments' error (dvyukov/go-fuzz#313) by setting 'go 1.17' directive.
+ - go mod edit -go=1.17
  - ls -l
- 
+
  # Reduce chances of future surprises due to any caching.
  - rm -rf fuzz.zip ./freshworkdir