Move MountedSourceAccessor to libutil

src/libfetchers/meson.build

@@ -54,7 +54,6 @@ sources = files(
   'github.cc',
   'indirect.cc',
   'mercurial.cc',
-  'mounted-source-accessor.cc',
   'path.cc',
   'registry.cc',
   'store-path-accessor.cc',
@@ -72,7 +71,6 @@ headers = files(
   'filtering-source-accessor.hh',
   'git-lfs-fetch.hh',
   'git-utils.hh',
-  'mounted-source-accessor.hh',
   'registry.hh',
   'store-path-accessor.hh',
   'tarball.hh',

src/libutil/meson.build

@@ -153,6 +153,7 @@ sources = files(
   'json-utils.cc',
   'logging.cc',
   'memory-source-accessor.cc',
+  'mounted-source-accessor.cc',
   'position.cc',
   'posix-source-accessor.cc',
   'references.cc',
@@ -220,6 +221,7 @@ headers = [config_h] + files(
   'logging.hh',
   'lru-cache.hh',
   'memory-source-accessor.hh',
+  'mounted-source-accessor.hh',
   'muxable-pipe.hh',
   'os-string.hh',
   'pool.hh',