[asan] Remove .sh extension from asan_device_setup.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@202245 91177308-0d34-0410-b5e6-96231b3b80d8
[asan] asan_device_setup: fix a typo in usage text


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@202246 91177308-0d34-0410-b5e6-96231b3b80d8