[CMake] Add missing CMake files to release tarball.

cmake/modules/Makefile.am

 MODULES = \
+  AddGMPFlags.cmake        \
+  AddMETISFlags.cmake      \
+  AddParMETISFlags.cmake   \
+  AddUMFPackFlags.cmake    \
   CheckCXX11Features.cmake \
   CheckSharedPtr.cmake     \
-  AddUMFPackFlags.cmake    \
   DuneBoost.cmake \
   DuneCommonMacros.cmake  \
   DuneCxaDemangle.cmake   \
@@ -22,6 +25,7 @@ MODULES = \
   FindUMFPack.cmake       \
   Headercheck.cmake       \
   LanguageSupport.cmake   \
+  UseInkscape.cmake       \
   UseLATEX.cmake
 
 modulesdir = $(datadir)/cmake/modules

doc/comm/Makefile.am

@@ -4,6 +4,8 @@ SUBDIRS = figures
 
 MPIPROGRAMS = indexset poosc08 poosc08_test
 
+EXTRA_DIST = CMakeLists.txt
+
 # programs just to build when "make check" is used
 check_PROGRAMS = $(MPIPROGRAMS)
 # list of tests to run (indicestest is special case)
@@ -11,7 +13,7 @@ TESTS = $(MPIPROGRAMS)
 
 if BUILD_DOCS
   DOCFILES = communication.pdf
-  EXTRA_DIST = $(DOCFILES)
+  EXTRA_DIST += $(DOCFILES)
   EXTRAINSTALL = $(DOCFILES)
 endif