qProcessInfo was not correctly detecting the sysctl value for "hw.cpu64bit_capable".
qProcessInfo was not correctly detecting the sysctl value for "hw.cpu64bit_capable".

It was just detecting the existance of the value. If it gets the value correctly, we need to check that it is non-zero to see if cpu64bit_capable should be true.

<rdar://problem/20857426> 



git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@236759 91177308-0d34-0410-b5e6-96231b3b80d8

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