Improve the handling of kalimba ELF file section type recognition.

Recognise the SHT_NOBITS property in kalimba ELF, and determine this to be
of type zerofilled. Subsequently recognise this type to represent bytes
on the target's DATA address space, and therefore be sized accordingly.



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@219782 91177308-0d34-0410-b5e6-96231b3b80d8