Add windows 32bit build

scripts/build

@@ -4,8 +4,12 @@ source $(dirname $0)/version
 
 cd $(dirname $0)/..
 
+declare -A OS_ARCH_ARG
+
 OS_PLATFORM_ARG=(linux windows darwin)
-OS_ARCH_ARG=(amd64 arm)
+OS_ARCH_ARG[linux]="amd64 arm"
+OS_ARCH_ARG[windows]="386 amd64"
+OS_ARCH_ARG[darwin]="amd64"
 
 go build -ldflags="-w -s -X main.VERSION=$VERSION" -o bin/rancher
 
@@ -13,14 +17,8 @@ if [ -n "$CROSS" ]; then
     rm -rf build/bin
     mkdir -p build/bin
     for OS in ${OS_PLATFORM_ARG[@]}; do
-        for ARCH in ${OS_ARCH_ARG[@]}; do
+        for ARCH in ${OS_ARCH_ARG[${OS}]}; do
             OUTPUT_BIN="build/bin/rancher_$OS-$ARCH"
-            if test "$ARCH" = "arm"; then
-                if test "$OS" = "windows" || test "$OS" = "darwin"; then
-                    # windows/arm and darwin/arm does not compile without cgo :-|
-                    continue
-                fi
-            fi
             if test "$OS" = "windows"; then
                 OUTPUT_BIN="${OUTPUT_BIN}.exe"
             fi