Update go-winio to fix Go 1.8 compat

CHANGELOG.md

@@ -22,6 +22,7 @@ BUG FIXES:
  * client/artifact: Handle tars where file in directory is listed before
    directory [GH-2524]
  * driver/exec: Properly set file/dir ownership in chroots [GH-2552]
+ * driver/docker: Fix panic in Docker driver on Windows [GH-2614]
  * server: Reject non-TLS clients when TLS enabled [GH-2525]
  * server: Fix a panic in plan evaluation with partial failures and all_at_once
    set [GH-2544]

Vagrantfile

@@ -20,7 +20,8 @@ sudo DEBIAN_FRONTEND=noninteractive apt-get install -y build-essential curl git-
      liblxc1 lxc-dev lxc-templates                      \
      gcc-5-aarch64-linux-gnu binutils-aarch64-linux-gnu \
      libc6-dev-i386 linux-libc-dev:i386                 \
-     gcc-5-arm-linux-gnueabihf gcc-5-multilib-arm-linux-gnueabihf binutils-arm-linux-gnueabihf
+     gcc-5-arm-linux-gnueabihf gcc-5-multilib-arm-linux-gnueabihf binutils-arm-linux-gnueabihf \
+     gcc-mingw-w64 binutils-mingw-w64
 
 # Setup go, for development of Nomad
 SRCROOT="/opt/go"

scripts/build.sh

@@ -64,11 +64,11 @@ for target in $targets; do
             ;;
         "windows_386")
             echo "==> Building windows 386..."
-            CGO_ENABLED=1 GOARCH="386"   GOOS="windows" go build -ldflags "-X $LDFLAG" -o "pkg/windows_386/nomad.exe"
+            CGO_ENABLED=1 CXX=i686-w64-mingw32-g++ CC=i686-w64-mingw32-gcc     GOARCH="386"   GOOS="windows" go build -ldflags "-X $LDFLAG" -o "pkg/windows_386/nomad.exe"
             ;;
         "windows_amd64")
             echo "==> Building windows amd64..."
-            CGO_ENABLED=1 GOARCH="amd64" GOOS="windows" go build -ldflags "-X $LDFLAG" -o "pkg/windows_amd64/nomad.exe"
+            CGO_ENABLED=1 CXX=x86_64-w64-mingw32-g++ CC=x86_64-w64-mingw32-gcc GOARCH="amd64" GOOS="windows" go build -ldflags "-X $LDFLAG" -o "pkg/windows_amd64/nomad.exe"
             ;;
         "darwin_amd64")
             echo "==> Building darwin amd64..."