IKXCLOCK-9831 Hardcode string into kernel version

Hardcode the string (android@gpe) into the kernel version for
no good reason other than Google requires it.

Change-Id: I5b1e952e708250509cdb5dd5d2a0afbcbc026829
(cherry picked from commit 92ce7129)

Makefile

 VERSION = 3
 PATCHLEVEL = 10
 SUBLEVEL = 40
-EXTRAVERSION =
+EXTRAVERSION = -\(android@gpe\)
 NAME = TOSSUG Baby Fish
 
 # *DOCUMENTATION*