Fix adb/fastboot windows compilations.

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

(cherry-pick of 4115139c57ac27f49dfde88f42b8cde0f6b42154.)

Change-Id: If6959df9909d9d9928e9f4a2a96018166361cf3c
diff --git a/adb_auth_host.c b/adb_auth_host.c
index 4c33d14..a859199 100644
--- a/adb_auth_host.c
+++ b/adb_auth_host.c
@@ -15,9 +15,12 @@
  */
 
 #include <stdio.h>
+#include <stdlib.h>
 
 #ifdef _WIN32
-#  define WIN32_LEAN_AND_MEAN
+#  ifndef WIN32_LEAN_AND_MEAN
+#    define WIN32_LEAN_AND_MEAN
+#  endif
 #  include "windows.h"
 #  include "shlobj.h"
 #else