Fix the warnings introduced

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@213643 91177308-0d34-0410-b5e6-96231b3b80d8
Fix an issue where an entry point of 0x00 would cause LLDB to think that the ELF is not executable without checking for ET_EXEC

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@213644 91177308-0d34-0410-b5e6-96231b3b80d8