Vertical ordering of dynamic indications

[Nick Payne]

In the following, how can I get the hairpin above the textual
indication? Playing around with outside-staff-priority doesn't change
the order, presumably because they don't start at the same instant.

\version "2.17.5"

mpDolceEtc = \markup { mp \normal-text\italic { dolce ad espressivo } }
mpDolceEtcDynamic = #(make-dynamic-script mpDolceEtc)

\relative c' {
  \time 3/4
  c4 c c
  c_\mpDolceEtcDynamic c\< c c c c\!
}