Merge pull request #31038 from orivej/autofs

autofs: do not strip needed symbols

pkgs/os-specific/linux/autofs/default.nix

···
     export E2FSCK=${e2fsprogs}/bin/fsck.ext2
     export E3FSCK=${e2fsprogs}/bin/fsck.ext3
     export E4FSCK=${e2fsprogs}/bin/fsck.ext4
+
+    unset STRIP # Makefile.rules defines a usable STRIP only without the env var.
   '';
 
   installPhase = ''