Fix gcc buildbot failures, re-enable tests disabled due to llvm.org/pr16575



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@186166 91177308-0d34-0410-b5e6-96231b3b80d8
The correct max value for size_t variables is SIZE_MAX not UINT64_MAX.  Removes lots of warnings when building on 32 bit hosts.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@186168 91177308-0d34-0410-b5e6-96231b3b80d8