Fixed build folder permission error

Makefile

@@ -8,6 +8,8 @@ setup:
 build: 
 	set -e
 
+	mkdir -p build
+
 	cd scripts
 
 	./setup-root-fs.sh

scripts/debian.sh

@@ -1,7 +1,6 @@
 #!/bin/bash
 set -e
 
-mkdir -p ../build
 cd ../build
 
 if [ "$EUID" -ne 0 ]; then

scripts/linux-dtbs.sh

@@ -2,7 +2,6 @@
 
 set -e
 
-mkdir -p ../build
 cd ../build
 
 [[ -d wallaby-linux ]] || git clone https://github.com/F-WuTS/wallaby-linux.git --depth=1

scripts/make-sd-card.sh

@@ -1,7 +1,6 @@
 #!/bin/bash
 set -e
 
-mkdir -p ../build
 cd ../build
 
 if [ "$EUID" -ne 0 ]