[LLDB] - Add support for DW_RLE_start_end entries (.debug_rnglists)

DWARF5 describes DW_RLE_start_end as:

This is a form of bounded range entry that has two target address operands.
Each operand is the same size as used in DW_FORM_addr. These indicate
the starting and ending addresses, respectively, that define the address range
for which the following location is valid.

The patch implements the support.

Differential revision: https://reviews.llvm.org/D53193

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@344674 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed