Update runEddy script to work with new multi-threaded version.

The eddy_cpu command is called twice - once with --nthr=1, and again with --nthr=8

Note that these changes will not work with the openmp eddy build, so do not merge / use this MR until threddy has been released.

eddy/runEddy

@@ -76,7 +76,7 @@ do
     # into eddy_cpu --nthr=N
     fsl_sub="fsl_sub -l ${outdir} -q long.q"
     exe="${exe_name%_nthr*}"
-    nthr="${variant#eddy_cpu_nthr_}"
+    nthr="${variant#cpu_nthr_}"
     eddy_args+=("--nthr=${nthr}")
     if [ "${nthr}" != "1" ]; then
       fsl_sub="${fsl_sub} -s openmp,${nthr}"