Open up third party projects

Change-Id: Ie69c27f7eea9f9146736c76b258cdf6164197124
Reviewed-on: https://pigweed-review.googlesource.com/c/Third-Party-Projects/+/37800
Reviewed-by: Anthony DiGirolamo <tonymd@google.com>

project.config

diff --git a/project.config b/project.config
index 0ba51cf..5a22172 100644
--- a/project.config
+++ b/project.config
@@ -1,5 +1,5 @@
 [access]
-	inheritFrom = All-Projects
+	inheritFrom = Public-Projects
 [submit]
 	action = inherit
 [access "refs/heads/upstream/*"]