Fix crash when dumping ELF with empty map entry
Fix crash when dumping ELF with empty map entry

Recently PAL has a change on pipeline ABI, and our internal compiler
may generate ELF with an empty map entry.

This commit deal with that case by skipping the empty map.

GPUOpen-Drivers/llpc,GPUOpen-Drivers/llpc,GPUOpen-Drivers/llpc,GPUOpen-Drivers/llpc,GPUOpen-Drivers/llpc