[storage] Add memfs component for fshost_fxfs AIB

Add the memfs component which is required for fxfs
to the fxfs_fshost AIB

Change-Id: Ia44043f12068687a03b1d38d92bd51dbcabc0212
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/798866
Reviewed-by: Stephen Demos <sdemos@google.com>
Commit-Queue: David Iserovich <diserovich@google.com>
diff --git a/src/storage/fshost-rust/BUILD.gn b/src/storage/fshost-rust/BUILD.gn
index 136c30b..75451e1 100644
--- a/src/storage/fshost-rust/BUILD.gn
+++ b/src/storage/fshost-rust/BUILD.gn
@@ -137,6 +137,7 @@
     ":fshost_rust_fxfs_component",
     "//src/storage/fxfs:fxfs_component",
     "//src/storage/fxfs-crypt",
+    "//src/storage/memfs:memfs_component",
   ]
 }