kubectl's dir should be 386 not x86 in x86 enviroment

Before applying this patch, `cluster/kubectl.sh` failed to find `kubectl` binary in x86 environment. e.g. The latest release v0.17.1 contains following binaries: https://github.com/GoogleCloudPlatform/kubernetes/releases/tag/v0.17.1 ``` $ tree platforms/ platforms/ ├── darwin │ ├── 386 │ │ └── kubectl │ └── amd64 │ └── kubectl ├── linux │ ├── 386 │ │ └── kubectl │ ├── amd64 │ │ └── kubectl │ └── arm │ └── kubectl └── windows └── amd64 └── kubectl.exe ```

kubectl's dir should be 386 not x86 in x86 enviroment
dec14360 · orangain · 9797255a · dec14360
Commit dec14360 authored May 25, 2015 by orangain
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kubectl.sh cluster/kubectl.sh +1 -1

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--- a/cluster/kubectl.sh
+++ b/cluster/kubectl.sh
@@ -59,7 +59,7 @@ case "$(uname -m)" in
    host_arch=arm
    ;;
  i?86*)
-    host_arch=x86
+    host_arch=386
    ;;
  *)
    echo "Unsupported host arch. Must be x86_64, 386 or arm." >&2