Fixing spelling errors in adb docs

Change-Id: I9376717165a01e207034f84a31f85335d3740f18
diff --git a/adb/OVERVIEW.TXT b/adb/OVERVIEW.TXT
index 6a5191a..c40695a 100644
--- a/adb/OVERVIEW.TXT
+++ b/adb/OVERVIEW.TXT
@@ -35,7 +35,7 @@
     (through USB for devices, through TCP for emulators) and provide a
     few services for clients that run on the host.
 
-    The ADB server considers that a device is ONLINE when it has succesfully
+    The ADB server considers that a device is ONLINE when it has successfully
     connected to the adbd program within it. Otherwise, the device is OFFLINE,
     meaning that the ADB server detected a new device/emulator, but could not
     connect to the adbd daemon.