Auto merge of #22355 - gterzian:add_linux_sampler, r=asajeffrey,gterzian

Add linux sampler

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- [x] These changes fix #22203 (github issue number if applicable).

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python/servo/bootstrap.py

@@ -113,7 +113,7 @@ def linux(context, force=False):
                 'build-essential', 'cmake', 'python-pip',
                 'libbz2-dev', 'libosmesa6-dev', 'libxmu6', 'libxmu-dev', 'libglu1-mesa-dev',
                 'libgles2-mesa-dev', 'libegl1-mesa-dev', 'libdbus-1-dev', 'libharfbuzz-dev',
-                'ccache', 'clang', 'autoconf2.13']
+                'ccache', 'clang', 'autoconf2.13', "libunwind-dev"]
     pkgs_dnf = ['libtool', 'gcc-c++', 'libXi-devel', 'freetype-devel',
                 'mesa-libGL-devel', 'mesa-libEGL-devel', 'glib2-devel', 'libX11-devel',
                 'libXrandr-devel', 'gperf', 'fontconfig-devel', 'cabextract', 'ttmkfdir',