Debugger: implement DWARF5 indirect string and address forms

Change-Id: Ie3ee6f4eb14606ee2d412d8e7122d59472619f81
Reviewed-on: https://review.haiku-os.org/c/haiku/+/7059
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

Debugger: introduce target endianness handling

Change-Id: I597a667de1461383ce9e96e8ea9902895cf80ec6
Reviewed-on: https://review.haiku-os.org/c/haiku/+/7073
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

Debugger: implement DWARFv5 line-info handling

* add new field for .debug_line_str section
* implement reading string and int values tagged with DW_FORM_*
* skip new fields addressSize, segmentSelectorSize in line info header
* parse directories and file names according to new syntax
* enable line-info parsing up to version 5

Change-Id: I1dd7e0d834c73f6d72b7115c7ded9f868be84a3d
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6978
Reviewed-by: Rene Gollent <rene@gollent.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

Fix clang warning "mismatched-tags"

Change-Id: I00f26e27d8ac24a46b528ea7ed47b92c2967ff2e
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2390
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

Debugger: Split into core library and application.

- Add subfolder src/kits/debugger which contains the debugger's core
functionality and lower layers. Correspondingly add headers/private/debugger
for shared headers to be used by clients such as the Debugger application
and eventual remote_debug_server. Adjust various files to account for
differences as a result of the split and moves.
- Add libdebugger.so to minimal Jamfile.