buildsystem: big rework & cleanup - PART-1: split functions from 'config/path' to an seperate file 'config/functions', rework and cleanup some build scripts, remove references to $TARGET_PLATFORM, add support for more then one downloadurl for $PKG_URL (partially done), remove support for: $PKG_DIR/arch, $PKG_DIR/platform, $PKG_DIR/url files, remove support for *.diff patches, create download-stampfiles in sources/$PKG_NAME, create md5 files after download, add support to download all sources at once with './scripts/get'

Signed-off-by: Stephan Raue <stephan@openelec.tv>

scripts/extract

@@ -10,19 +10,18 @@ fi
 [ -z "$PKG_URL" ] && exit 1
 [ ! -d "$SOURCES/$1" -o ! -d "$3" ] && exit 1
 
-[ -n "$PKG_URL" ] && \
-  FILES="$FILES `echo $PKG_URL | sed 's%.*/\(.*\)\$%\1%'`"
+for i in $PKG_URL; do
+  FILE="`basename $i`"
 
-for s in $FILES; do
-  case $s in
+  case $FILE in
   $2)
-    f="$SOURCES/$1/$s"
+    f="$SOURCES/$1/$FILE"
     if [ ! -f $f ]; then
-      echo "error: File $s doesn't exists in package $1 sources directory"
+      echo "error: File $FILE doesn't exists in package $1 sources directory"
       echo "have you called scripts/extract before scripts/get ?"
       exit 1
     fi
-    case $s in
+    case $FILE in
       *.tar)
         tar xf $f -C $3
         ;;