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

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

Index: tools/cc-frame-viewer/third_party/gl-matrix/TESTING.md
diff --git a/tools/cc-frame-viewer/third_party/gl-matrix/TESTING.md b/tools/cc-frame-viewer/third_party/gl-matrix/TESTING.md
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+Running the test suite
+=======================
+
+The unit tests are built upon the following tools:
+
+* Jasmine -- the underlying test suite which executes the test and reports feedback
+* node.js -- used for testing at the command line, via the `jasmine-node` package
+* selenium -- used for automated in-browser testing via Ruby
+
+If Ruby is installed, you can set up with:
+
+    gem install bundler
+    bundle install
+
+...and then test with:
+
+    rake
+    
+Hint: also look at
+
+    rake --tasks
+
+If Ruby is not installed, you must test with `jasmine-node` directly:
+
+    NODE_PATH=$NODE_PATH:.                       \
+      node_modules/jasmine-node/bin/jasmine-node \
+      spec/helpers/node_helper.js