Add hw/ip/isp to the manifest

Change-Id: I6658e7b7ed5fd782c87b43a32b93f5576d029aac

manifest.xml

diff --git a/manifest.xml b/manifest.xml
index c7cf7f5..db9c287 100644
--- a/manifest.xml
+++ b/manifest.xml
@@ -64,6 +64,7 @@
 
   <!-- Matcha -->
   <project name="hw/matcha"                       path="hw/matcha" />
+  <project name="3p/ip/isp"                       path="hw/ip/isp" />
 
   <!-- TockOS -->
   <project name="3p/tock/tock"       dest-branch="master" path="sw/tock" />