am b6a1c180: Keep the crt start/end var name of sh consistent with other archs

Merge commit 'b6a1c1802961f40fe4736e80402f849968cd2563' into gingerbread

* commit 'b6a1c1802961f40fe4736e80402f849968cd2563':
  Keep the crt start/end var name of sh consistent with other archs