Fix adb/fastboot windows compilations.

Many of the windows files where not including stdlib.h even though they
are using malloc/free calls.

Bug: 18283958
(cherry picked from commit ae7bf0959bd3f79afbf365e41f015ed1c304afdc)

Change-Id: Iebc09cc314fa8f0ba6c6cd45ba26135052f156dd
diff --git a/adb/usb_windows.c b/adb/usb_windows.c
index b7ad913..a2d7226 100644
--- a/adb/usb_windows.c
+++ b/adb/usb_windows.c
@@ -21,6 +21,7 @@
 #include <usb100.h>
 #include <adb_api.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 #include "sysdeps.h"