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/icd/common/icd-spv.h b/icd/common/icd-spv.h
index 8225238..eafe25e 100644
--- a/icd/common/icd-spv.h
+++ b/icd/common/icd-spv.h
@@ -20,9 +20,8 @@
  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  * DEALINGS IN THE SOFTWARE.
  *
- * Authors:
- *   Courtney Goeltzenleuchter <courtney@lunarg.com>
- *   Chia-I Wu <olv@lunarg.com>
+ * Author: Cody Northrop <cody@lunarg.com>
+ *
  */
 
 #ifndef ICD_SPV_H