Add new conf-dwarfutils package

[ajbt200128]

Hello all!
This just adds a simple conf-dwarfutils package, for pulling in the dwarfutils suite of tools.

[jmid]

Suggested change

	["libdwarf-dev" "dwarfdump" "libdwarf1"] {os-family = "debian"}
	["libdwarf-dev" "dwarfdump" "libdwarf1"] {os-family = "ubuntu"}
	["libdwarf-dev" "dwarfdump" "libdwarf1" "zlib1g-dev"] {os-family = "debian"}
	["libdwarf-dev" "dwarfdump" "libdwarf1" "zlib1g-dev"] {os-family = "ubuntu"}

A suggestion to address some of the Debian and Ubuntu failures:
https://opam.ci.ocaml.org/github/ocaml/opam-repository/commit/4f48a01f4520ed3840d1d67ec392d24869f36ff1/variant/compilers,4.08,conf-dwarfutils.1

#=== ERROR while compiling conf-dwarfutils.1 ==================================#
# context              2.5.0 | linux/x86_64 | ocaml-base-compiler.4.08.1 | pinned
# path                 ~/.opam/4.08/.opam-switch/build/conf-dwarfutils.1
# command              ~/.opam/opam-init/hooks/sandbox.sh build pkg-config --print-errors --exists libdwarf
# exit-code            1
# env-file             ~/.opam/log/conf-dwarfutils-7-3b0b41.env
# output-file          ~/.opam/log/conf-dwarfutils-7-3b0b41.out
### output ###
# Package zlib was not found in the pkg-config search path.
# Perhaps you should add the directory containing `zlib.pc'
# to the PKG_CONFIG_PATH environment variable
# Package 'zlib', required by 'libdwarf', not found
# Package 'libzstd', required by 'libdwarf', not found

There are other ones too, indicating that on some setups the right pkg_config path is not set up:
https://opam.ci.ocaml.org/github/ocaml/opam-repository/commit/4f48a01f4520ed3840d1d67ec392d24869f36ff1/variant/distributions,ubuntu-25.04-ocaml-4.14,conf-dwarfutils.1

#=== ERROR while compiling conf-dwarfutils.1 ==================================#
# context              2.5.0 | linux/x86_64 | ocaml-base-compiler.4.14.2 | pinned
# path                 ~/.opam/4.14/.opam-switch/build/conf-dwarfutils.1
# command              ~/.opam/opam-init/hooks/sandbox.sh build pkg-config --print-errors --exists libdwarf
# exit-code            1
# env-file             ~/.opam/log/conf-dwarfutils-8-edc1b7.env
# output-file          ~/.opam/log/conf-dwarfutils-8-edc1b7.out
### output ###
# Package libdwarf was not found in the pkg-config search path.
# Perhaps you should add the directory containing `libdwarf.pc'
# to the PKG_CONFIG_PATH environment variable
# Package 'libdwarf', required by 'virtual:world', not found