When starpu_smpirun is executed from source, take the xslt from source too

tools/starpu_smpirun.in

@@ -20,6 +20,11 @@
 prefix=@prefix@
 SMPIRUN=@smpirun_path@
 STARPU_DATADIR=@datarootdir@
+SOURCE_DATADIR=@abs_srcdir@
+BUILDDIR=@abs_builddir@
+
+# When executed from source, take xslt from source
+[ "$(realpath $0)" = $BUILDDIR/starpu_smpirun ] && STARPU_DATADIR=$SOURCE_DATADIR
 
 MPI_PLATFORM=""
 MPI_HOSTFILE=""