[DwarfGenerator] Emit dwarf address section when dwarf version is not less than 4

Some targets (like AIX) might not feature dwarf address section due to low dwarf version. Check before emitting one.

Fixed DebugInfo unit test failures in https://lab.llvm.org/buildbot/#/builders/214/builds/5739.

Reviewed By: qiucf

Differential Revision: https://reviews.llvm.org/D143561