tools/libtool: refresh patches

Preparation for bumping libtool several versions at once,
which includes some complex changes to patches.

Remove an empty line change from a patch.

Signed-off-by: Michael Pratt <mcpratt@pm.me>

tools/libtool/patches/120-strip-unsafe-dirs-for-relinking.patch

@@ -1,6 +1,6 @@
 --- a/libltdl/config/ltmain.m4sh
 +++ b/libltdl/config/ltmain.m4sh
-@@ -2183,6 +2183,9 @@ func_mode_install ()
+@@ -2186,6 +2186,9 @@ func_mode_install ()
  	    relink_command=`$ECHO "$relink_command" | $SED "s%@inst_prefix_dir@%%"`
  	  fi