Fix #1488

gox doesn't get copied anywhere that might be in the users $PATH by default, however if someone has a functional Go setup they are required to have a $GOPATH variable which will contain their Go workspace and executables of all built go programs under $GOPATH/bin
There are certainly many solutions to this but after reading the Go documentation this seemed to me like it would be the quickest and most cross-platform.

scripts/build.sh

@@ -38,7 +38,7 @@ fi
 
 # Build!
 echo "==> Building..."
-gox \
+$GOPATH/bin/gox \
     -os="${XC_OS}" \
     -arch="${XC_ARCH}" \
     -ldflags "-X main.GitCommit ${GIT_COMMIT}${GIT_DIRTY} -X main.GitDescribe ${GIT_DESCRIBE}" \