Add new headers to the Makefile

[[Imported from SVN: r6260]]

dune/common/parallel/Makefile.am

@@ -3,6 +3,14 @@
 SUBDIRS =
 
 parallelincludedir = $(includedir)/dune/common/parallel
-parallelinclude_HEADERS =
+parallelinclude_HEADERS = communicator.hh     \
+                          indexset.hh         \
+                          indicessyncer.hh    \
+                          interface.hh        \
+                          localindex.hh       \
+                          plocalindex.hh      \
+                          remoteindices.hh    \
+                          selection.hh
+
 
 include $(top_srcdir)/am/global-rules