Remove bind tools

We are not using these anywhere, busybox provides some of them.

Avoids security warnings.

Rework of #684

Signed-off-by: Justin Cormack <justin.cormack@docker.com>

alpine/Dockerfile

@@ -1,4 +1,4 @@
-FROM mobylinux/alpine-base:93c690d16e3743feb9b99aede0569582d7038548
+FROM mobylinux/alpine-base:c1301a5d6cba62693c16e3c712d32e8b3cb27d91
 
 ENV ARCH=x86_64
 

alpine/base/alpine-base/Dockerfile

@@ -6,7 +6,6 @@ RUN \
   apk update && apk upgrade && \
   apk add --no-cache \
   alpine-conf \
-  bind-tools \
   busybox-initscripts \
   chrony \
   cifs-utils \

alpine/base/alpine-base/packages

@@ -2,8 +2,6 @@ alpine-baselayout 3.0.3-r0
 alpine-conf 3.4.1-r5
 alpine-keys 1.1-r0
 apk-tools 2.6.7-r0
-bind-libs 9.10.4_p4-r0
-bind-tools 9.10.4_p4-r0
 busybox 1.24.2-r12
 busybox-initscripts 3.0-r3
 ca-certificates 20160104-r4
@@ -32,7 +30,6 @@ libcom_err 1.43-r0
 libcrypto1.0 1.0.2j-r0
 libcurl 7.51.0-r0
 libfdisk 2.28-r3
-libgcc 5.3.0-r0
 libmnl 1.0.3-r1
 libnftnl-libs 1.0.5-r0
 libnl 1.1.4-r0