Update build stuff

build/Makefile

 .PHONY: all clean
 
-all: x86_64
+all:
+	@echo "ARCH not specified!"
 
 x86_64: x.c util.c
 	./build-diet.sh x86_64

build/build-diet.sh

 #!/bin/sh
 
-set -v
-
 if [ $# -lt 1 ]; then
 	echo "Usage: $0 <ARCH> <CROSS>"
     exit 1
@@ -12,7 +10,7 @@ if [ ! -d ./dietlibc ]; then
 fi
 
 cd dietlibc
-make clean
+
 if [ $1 = "arm" ]; then
 	make ARCH="$1" CROSS=arm-linux-gnueabihf-
 elif [ $1 = "i386" ]; then
@@ -20,4 +18,5 @@ elif [ $1 = "i386" ]; then
 elif [ $1 = "x86_64" ]; then
     make ARCH="$1"
 fi
+
 cd ..