misc: Update author information

Author information was added to any file
with the standard license text.
Authors were added that added/changed >= 3%
of the lines of a file.
diff --git a/layers/basic.cpp b/layers/basic.cpp
index 98039cf..21f93a1 100644
--- a/layers/basic.cpp
+++ b/layers/basic.cpp
@@ -20,6 +20,9 @@
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  * DEALINGS IN THE SOFTWARE.
+ *
+ * Author: David Pinedo <david@lunarg.com>
+ * Author: Jon Ashburn <jon@lunarg.com>
  */
 #include <string.h>
 #include <stdlib.h>