<rdar://problem/13646047>

Providing a Python helper SBData.CreateDataFromInt() to make an SBData out of a single integer number
It tries to use the current target, if any, for endianness and pointer size, and it picks a reasonable size on your behalf - if there is no way it can infer anything reasonable it essentially picks a 64-bit Mac as the reference model

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@183793 91177308-0d34-0410-b5e6-96231b3b80d8