[manifest] Add 3pp to infra manifest

Last time this change was merged, it broke local checkouts. fxr/708924 The plan is to merge this change, get the shape of how it breaks checkouts, revert, and coordinate with the folks working on the jiri / git submodule transition to see what went wrong and fix it.

Change-Id: I2cdd747e8ebcc21444f63e6132e2983b444c785e
Reviewed-on: https://fuchsia-review.googlesource.com/c/manifest/+/807595
Reviewed-by: Oliver Newman <olivernewman@google.com>
diff --git a/infra b/infra
index db0a81d..8645dc8 100644
--- a/infra
+++ b/infra
@@ -12,6 +12,10 @@
              path="fuchsia/manifest"/>
     <!-- Name things <gerrit-host-prefix> so that this can be imported
          into other manifests that pull in infra repos from multiple hosts. -->
+    <project name="fuchsia/3pp"
+             path="fuchsia/3pp"
+             remote="https://fuchsia.googlesource.com/infra/3pp"
+             gerrithost="https://fuchsia-review.googlesource.com"/>
     <project name="fuchsia/infra"
              path="fuchsia/infra"
              remote="https://fuchsia.googlesource.com/infra/infra"