[mips][asan] Fix preinstalled_signal.cc test for mips
[mips][asan] Fix preinstalled_signal.cc test for mips

Linux for mips has a non-standard layout for the kernel sigaction struct.
Adjust the layout by the minimally amount to get the test to pass, as we
don't require the usage of the restorer function.


git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@314200 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