ADB Backup: add ability for TWRP GUI to restore

Restore adb backup files that TWRP made to your PC.
Put files in your backup directory to see them.

e.g. /sdcard/TWRP/BACKUPS/<sn>

Change-Id: I2c57970d77b64c39a302159041456e761c185259
diff --git a/partition.cpp b/partition.cpp
index 44403d8..4157e97 100644
--- a/partition.cpp
+++ b/partition.cpp
@@ -2249,7 +2249,7 @@
 		gui_msg(Msg(msg::kError, "error_opening_strerr=Error opening: '{1}' ({2})")(destfn.c_str())(strerror(errno)));
 		goto exit;
 	}
-	
+
 	LOGINFO("Reading '%s', writing '%s'\n", srcfn.c_str(), destfn.c_str());
 
 	if (part_settings->adbbackup) {