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 branch 'cm-10.2' of git://github.com/CyanogenMod/android_vendor_cm into cd-4.3