update expected test result for TC_sacch_multi_chg

This test has been passing since osmo-bts commit
eee7247ebe0d0a54a54b53b739bdd434dfceb511, so expect
it to pass instead of fail.

Change-Id: I576f881fcb40c4fcbe6b6f767220111a0e9ffd3c
Related: OS#3173
1 file changed