Add external/iw to the manifest

Change-Id: I6a55f2d8962a1a6ec2ba06a1f336875a2022692a

default.xml

@@ -160,6 +160,7 @@
   <project path="external/ipsec-tools" name="platform/external/ipsec-tools" groups="pdk-cw-fs" />
   <project path="external/iptables" name="platform/external/iptables" groups="pdk-cw-fs" />
   <project path="external/iputils" name="platform/external/iputils" groups="pdk-cw-fs" />
+  <project path="external/iw" name="platform/external/iw" />
   <project path="external/jack" name="platform/external/jack" groups="pdk-cw-fs" />
   <project path="external/jarjar" name="platform/external/jarjar" groups="pdk" />
   <project path="external/javasqlite" name="platform/external/javasqlite" groups="pdk-cw-fs" />