Temporary hack to debug the MATE grammar.

Builds on my machines, physical and virtual, crash with an assertion
failure in the MATE Lemon grammar when parsing the MATE configuration
file in bug 12161 - on Mac OS X Lion with llvm-gcc, Ubuntu 15.10 with
GCC, and on macOS Sierra with clang.

Builds on the macOS buildbot do *not* fail.

So put the result of Lemon in the MATE plugin into the release tarball,
so I can compare it with what Lemon generates on my machine.

Change-Id: I2d5ecee68535a8b4803de0bd7f02d448ab629083
Reviewed-on: https://code.wireshark.org/review/21126
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Guy Harris <guy@alum.mit.edu>

plugins/mate/Makefile.am

@@ -108,6 +108,9 @@ MAINTAINERCLEANFILES = \
 
 EXTRA_DIST = \
 	mate_grammar.lemon	\
+	mate_grammar.c		\
+	mate_grammar.h		\
+	mate_grammar.out	\
 	mate_parser.l		\
 	plugin.rc.in		\
 	CMakeLists.txt		\