Update README.chromium to reflect whether a tool is shipped or not

Mark tools that are only used for testing as NOT_SHIPPED. Also fix bintree's license (MIT License -> MIT) and fix the name & short name of libc++-static.

BUG=499582

Review URL: https://codereview.chromium.org/1532203002

Cr-Original-Commit-Position: refs/heads/master@{#369150}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 6175da8042f3a0aa574f0da25e87be342625e603
diff --git a/README.chromium b/README.chromium
index cfa8165..2520861 100644
--- a/README.chromium
+++ b/README.chromium
@@ -4,7 +4,7 @@
 Version: 0.7.0-updates
 Revision: 2be6d65e31c7ee6320d059f581f05ae8d89d7e45 
 License: MIT
-License File: src/LICENSE
+License File: NOT_SHIPPED
 Security Critical: no
 
 Description: