Fix "make distclean" when used with MPI extensions. We were

accidentally adding component names to the OMPI_MPIEXT_ALL_SUBDIRS
variable twice; once with mpiext/ and once without.  And then
prefixing all of them with mpiext/ again at the end.  That wasn't
really necessary :-) -- we only need to add it once (without mpiext/)
and then prefix at the end (for consistency with the
OMPI_MPI_EXT_*_SUBDIRS handling).

This commit was SVN r26981.

config/ompi_ext.m4

@@ -462,8 +462,7 @@ AC_DEFUN([EXT_PROCESS_COMPONENT],[
 
     # Save the list of headers and convenience libraries that this
     # component will output
-    thisdir="mpiext/$component"
-    $2="$$2 $thisdir"
+    $2="$$2 $component"
     $3="$$3 $component"
 
     # JMS Where is this needed?
@@ -629,10 +628,6 @@ EOF
 EOF
     fi
 
-    # Add this component name to the master list of all EXT component
-    # subdirs
-    $2="$$2 ${component}"
-
     m4_ifdef([OMPI_MPIEXT_]$1[_NEED_INIT],
              [echo "extern const ompi_mpiext_component_t ompi_mpiext_${component};" >> $outfile.extern
               echo "  &ompi_mpiext_${component}, " >> $outfile.struct])