Add config.h.cmake to git

For some reason I must have forgotten to check in this file when
first converting to the cmake build system.

config.h.cmake

+/* begin dune-gfe
+   put the definitions for config.h specific to
+   your project here. Everything above will be
+   overwritten
+*/
+
+/* begin private */
+/* Name of package */
+#define PACKAGE "@DUNE_MOD_NAME@"
+
+/* Define to the address where bug reports for this package should be sent. */
+#define PACKAGE_BUGREPORT "@DUNE_MAINTAINER@"
+
+/* Define to the full name of this package. */
+#define PACKAGE_NAME "@DUNE_MOD_NAME@"
+
+/* Define to the full name and version of this package. */
+#define PACKAGE_STRING "@DUNE_MOD_NAME@ @DUNE_MOD_VERSION@"
+
+/* Define to the one symbol short name of this package. */
+#define PACKAGE_TARNAME "@DUNE_MOD_NAME@"
+
+/* Define to the home page for this package. */
+#define PACKAGE_URL "@DUNE_MOD_URL@"
+
+/* Define to the version of this package. */
+#define PACKAGE_VERSION "@DUNE_MOD_VERSION@"
+
+/* end private */
+
+/* Define to the version of dune-gfe */
+#define DUNE_GFE_VERSION "@DUNE_GFE_VERSION@"
+
+/* Define to the major version of dune-gfe */
+#define DUNE_GFE_VERSION_MAJOR @DUNE_GFE_VERSION_MAJOR@
+
+/* Define to the minor version of dune-gfe */
+#define DUNE_GFE_VERSION_MINOR @DUNE_GFE_VERSION_MINOR@
+
+/* Define to the revision of dune-gfe */
+#define DUNE_GFE_VERSION_REVISION @DUNE_GFE_VERSION_REVISION@
+
+/* end dune-gfe
+   Everything below here will be overwritten
+*/