Always recreate brew caller script

modules/04-install-brew.sh

@@ -107,6 +107,7 @@ function createBrewCallerScript() {
 	local brewCallerPath="${homebrewRepositoryPath}/bin/brew-caller"
 	local brewCallerSymlink="/usr/local/bin/brew"
 	[ -f "${brewCallerPath}" ] && rm "${brewCallerPath}"
+	[ -f "${brewCallerSymlink}" ] && rm "${brewCallerSymlink}"
 	cat <<- BREWCALLER | clang -x c -O2 -Wall -o "${brewCallerPath}" -
 	#include <unistd.h>
 	#include <sys/types.h>