Ensure that all targets get copied when doing a buildall build

buildscript

@@ -207,8 +207,6 @@ prebuild() {
 build() {
     prebuild
 
-    rm_firmware
-
     opath=$(pwd)
     cd "$builddir"
     cpus=$(nproc)
@@ -371,9 +369,11 @@ setBSP()
 }
 
 buildall() {
+    rm_firmware
     for bsp in $(/bin/ls bsp/*.bsp); do
         setBSP "$bsp"
         build "$1"
+        cp_firmware
     done
 }
 
@@ -452,6 +452,7 @@ case "$1" in
             echo "Usage: $0 $1 [fast|debug]"
             echo
         else
+            rm_firmware
             build "$2"
         fi
         ;;