prserv: add LOCALCOUNT to AUTOINCs migration feature

- use migrate_localcount.bbclass to generate AUTOINC entries
which are exported to LOCALCOUNT_DUMPFILE
- import the generated AUTOINC entries
- one can migrate LOCALCOUNT to AUTOINC by executing:
    bitbake-prserv-tool migrate_localcount

[YOCTO #3071]

(From OE-Core rev: ffab86f13cafb10d8d6273b6af8cd9a3c84eae20)

Signed-off-by: Constantin Musca <constantinx.musca@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/bitbake-prserv-tool

@@ -47,6 +47,35 @@ do_import ()
     return $ret
 }
 
+do_migrate_localcount ()
+{
+    df=`bitbake -R conf/migrate_localcount.conf -e | \
+                grep ^LOCALCOUNT_DUMPFILE= | cut -f2 -d\"`
+    if [ "x${df}" == "x" ];
+    then
+        echo "LOCALCOUNT_DUMPFILE is not defined!"
+        return 1
+    fi
+
+    rm -rf $df
+    clean_cache
+    echo "Exporting LOCALCOUNT to AUTOINCs..."
+    bitbake -R conf/migrate_localcount.conf -p
+    [ ! $? -eq 0 ] && echo "Exporting failed!" && exit 1
+
+    echo "Importing generated AUTOINC entries..."
+    [ -e $df ] && do_import $df
+
+    if [ ! $? -eq 0 ]
+    then
+        echo "Migration from LOCALCOUNT to AUTOINCs failed!"
+        return 1
+    fi
+
+    echo "Migration from LOCALCOUNT to AUTOINCs succeeded!"
+    return 0
+}
+
 [ $# -eq 0 ] && help  && exit 1
 
 case $1 in
@@ -56,6 +85,9 @@ export)
 import)
     do_import $2
     ;;
+migrate_localcount)
+    do_migrate_localcount
+    ;;
 *)
     help
     exit 1