[cc-frame-viewer] Add gl-matrix to third_party [redux]

tools/cc-frame-viewer/third_party/gl-matrix/LICENSE.md

Index: tools/cc-frame-viewer/third_party/gl-matrix/LICENSE.md
diff --git a/tools/cc-frame-viewer/third_party/gl-matrix/LICENSE.md b/tools/cc-frame-viewer/third_party/gl-matrix/LICENSE.md
new file mode 100644
index 0000000000000000000000000000000000000000..c9cda387534718bfd53a96faab5c0f5f49faa577
--- /dev/null
+++ b/tools/cc-frame-viewer/third_party/gl-matrix/LICENSE.md
@@ -0,0 +1,19 @@
+Copyright (c) 2013 Brandon Jones, Colin MacKenzie IV
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+ 1. The origin of this software must not be misrepresented; you must not
+    claim that you wrote the original software. If you use this software
+    in a product, an acknowledgment in the product documentation would be
+    appreciated but is not required.
+
+ 2. Altered source versions must be plainly marked as such, and must not
+    be misrepresented as being the original software.
+
+ 3. This notice may not be removed or altered from any source distribution.