vendor/cm: update CONTRIBUTORS

add Michael Limb (something15525) for Google Galaxy Nexus (toroplus)
add David Hays (flyhalf205) for Verizon HTC One (m7vzw)

Change-Id: I8fac4f71ee1c641de97eb1a43653097637924ecb
Merge remote-tracking branch 'upstream/cm-10.2' into dark-jelly-cm-10.2