[ubsan][arm] supporting misaligned testcase
[ubsan][arm] supporting misaligned testcase

After previous commit: http://reviews.llvm.org/rL224242, misaligned testcase is now supported on ARM also

git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@224243 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt