Allow for numeric cputype-cpusubtype specifications where the subtype is 0.  Use errno to detect strtoul parse failure instead of return value of 0.  <rdar://problem/12198994>
Allow for numeric cputype-cpusubtype specifications where the subtype is 0.  Use errno to
detect strtoul parse failure instead of return value of 0.  <rdar://problem/12198994>


git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@164183 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,llvm-mirror/lldb,llvm-mirror/lldb,llvm-mirror/lldb,apple/swift-lldb