Test and build official packages with Go 1.12 (#5923)

scripts/ci-1.11.docker

@@ -1,4 +1,4 @@
-FROM golang:1.11.5
+FROM golang:1.11.10
 
 RUN chmod -R 755 "$GOPATH"
 

scripts/ci-1.12.docker

@@ -0,0 +1,28 @@
+FROM golang:1.12.5
+
+RUN chmod -R 755 "$GOPATH"
+
+RUN DEBIAN_FRONTEND=noninteractive \
+	apt update && apt install -y --no-install-recommends \
+	autoconf \
+	git \
+	libtool \
+	locales \
+	make \
+	python-boto \
+	rpm \
+	ruby \
+	ruby-dev \
+	zip && \
+	rm -rf /var/lib/apt/lists/*
+
+RUN ln -sf /usr/share/zoneinfo/Etc/UTC /etc/localtime
+RUN locale-gen C.UTF-8 || true
+ENV LANG=C.UTF-8
+
+RUN gem install fpm
+
+RUN go get -d github.com/golang/dep && \
+    cd src/github.com/golang/dep && \
+    git checkout -q v0.5.0 && \
+    go install -ldflags="-X main.version=v0.5.0" ./cmd/dep