relative dir of share/ in scripts/build/output-distance.py

[Graham Percival]

Commit 79396368e20724a89d34c7a4c53989b8dace5814 (below) changes this
from %s/../share/ to %s/share/.  This is required to make the regtest
comparison work in GUB wiht the new regtest names.

I'm not 100% certain that this doesn't mess up the normal "make
test-check" or whatever it is that programmers use, but I can't test
GUB without this, so I pushed it.  If this commit causes any problems
whatsoever, please revert it.

Cheers,
- Graham

--- a/scripts/build/output-distance.py
+++ b/scripts/build/output-distance.py
@@ -611,7 +611,7 @@ class SignatureFileLink (FileLink):
                 outfile = (dest_dir + '/' + f).replace ('.eps', '.png')
                 data_option = ''
                 if options.local_data_dir:
-                    data_option =
('-slilypond-datadir=%s/../share/lilypond/current '
+                    data_option =
('-slilypond-datadir=%s/share/lilypond/current '
                                    % os.path.dirname(infile))

                 mkdir (os.path.split (outfile)[0])