Can't build minikube binary on AArch64

[arm64b]

Is this a BUG REPORT or FEATURE REQUEST? (choose one):
FEATURE REQUEST

Please provide the following details:

Environment:
Linux Ubuntu 16.04 LTS on AArch64 platform
Minikube version (use minikube version):

• OS (e.g. from /etc/os-release):

NAME="Ubuntu"
VERSION="16.04.3 LTS (Xenial Xerus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.04.3 LTS"
VERSION_ID="16.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
VERSION_CODENAME=xenial
UBUNTU_CODENAME=xenial

• VM Driver (e.g. cat ~/.minikube/machines/minikube/config.json | grep DriverName):
• ISO version (e.g. cat ~/.minikube/machines/minikube/config.json | grep -i ISO or minikube ssh cat /etc/VERSION):
• Install tools:
• Others:
  The above can be generated in one go with the following commands (can be copied and pasted directly into your terminal):

minikube version
echo "";
echo "OS:";
cat /etc/os-release
echo "";
echo "VM driver": 
grep DriverName ~/.minikube/machines/minikube/config.json
echo "";
echo "ISO version";
grep -i ISO ~/.minikube/machines/minikube/config.json

What happened:
When building minikube binary on arm64 server platform, below error encountered:

/go/src/k8s.io/minikube# make
make: *** No rule to make target 'out/minikube-linux-arm64', needed by 'out/minikube'.  Stop.

What you expected to happen:
The make command can generate the minikube bin on arm64 just as it does on amd64

How to reproduce it (as minimally and precisely as possible):

$ git clone https://github.com/kubernetes/minikube.git $GOPATH/src/k8s.io/minikube
$ cd $GOPATH/src/k8s.io/minikube
$ make 

Output of minikube logs (if applicable):

Anything else do we need to know:

# docker version
Client:
 Version:      unknown-version
 API version:  1.34
 Go version:   go1.9.2
 Git commit:   unknown-commit
 Built:        unknown-buildtime
 OS/Arch:      linux/arm64

Server:
 Version:      dev
 API version:  1.36 (minimum version 1.12)
 Go version:   go1.9.2
 Git commit:   ef3988a
 Built:        Thu Jan 18 02:24:13 2018
 OS/Arch:      linux/arm64
 Experimental: true

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[arm64b]

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