Upgrade go version in Makefiles to 1.7, use qemu 2.7, armel => armhf and goarm=6 => goarm=7 and use go 1.7.4

build/debian-iptables/Dockerfile

@@ -21,7 +21,8 @@ CROSS_BUILD_COPY qemu-ARCH-static /usr/bin/
 # All apt-get's must be in one run command or the
 # cleanup has no effect.
 RUN DEBIAN_FRONTEND=noninteractive apt-get update \
-    && DEBIAN_FRONTEND=noninteractive apt-get install -y iptables \
-    && DEBIAN_FRONTEND=noninteractive apt-get install -y ebtables \
-    && DEBIAN_FRONTEND=noninteractive apt-get install -y conntrack \
+    && DEBIAN_FRONTEND=noninteractive apt-get install -y \
+    iptables \
+    ebtables \
+    conntrack \
     && rm -rf /var/lib/apt/lists/*

build/debian-iptables/Makefile

@@ -16,15 +16,16 @@
 
 REGISTRY?="gcr.io/google_containers"
 IMAGE=debian-iptables
-TAG=v5
+TAG=v6
 ARCH?=amd64
 TEMP_DIR:=$(shell mktemp -d)
+QEMUVERSION=v2.7.0
 
 ifeq ($(ARCH),amd64)
 	BASEIMAGE?=debian:jessie
 endif
 ifeq ($(ARCH),arm)
-	BASEIMAGE?=armel/debian:jessie
+	BASEIMAGE?=armhf/debian:jessie
 	QEMUARCH=arm
 endif
 ifeq ($(ARCH),arm64)
@@ -52,7 +53,7 @@ else
 	# When cross-building, only the placeholder "CROSS_BUILD_" should be removed
 	# Register /usr/bin/qemu-ARCH-static as the handler for ARM binaries in the kernel
 	docker run --rm --privileged multiarch/qemu-user-static:register --reset
-	curl -sSL https://github.com/multiarch/qemu-user-static/releases/download/v2.6.0/x86_64_qemu-$(QEMUARCH)-static.tar.gz | tar -xz -C $(TEMP_DIR)
+	curl -sSL https://github.com/multiarch/qemu-user-static/releases/download/$(QEMUVERSION)/x86_64_qemu-$(QEMUARCH)-static.tar.gz | tar -xz -C $(TEMP_DIR)
 	cd $(TEMP_DIR) && sed -i "s/CROSS_BUILD_//g" Dockerfile
 endif