update to current autotools

- and update glpk check to new variant of AC_COIN_CHK_PKG macro

Author: svigerske

Makefile.in

@@ -1,4 +1,4 @@
-# Makefile.in generated by automake 1.16.2 from Makefile.am.
+# Makefile.in generated by automake 1.16.3 from Makefile.am.
 # @configure_input@
 
 # Copyright (C) 1994-2020 Free Software Foundation, Inc.
@@ -230,7 +230,6 @@ CC = @CC@
 CCDEPMODE = @CCDEPMODE@
 CFLAGS = @CFLAGS@
 COIN_PKG_CONFIG_PATH = @COIN_PKG_CONFIG_PATH@
-CPP = @CPP@
 CPPFLAGS = @CPPFLAGS@
 CXX = @CXX@
 CXXCPP = @CXXCPP@
@@ -350,6 +349,7 @@ pdfdir = @pdfdir@
 prefix = @prefix@
 program_transform_name = @program_transform_name@
 psdir = @psdir@
+runstatedir = @runstatedir@
 sbindir = @sbindir@
 sharedstatedir = @sharedstatedir@
 srcdir = @srcdir@
@@ -367,7 +367,7 @@ pkgconfiglibdir = $(libdir)/pkgconfig
 # html documentation.
 doxydocdir = $(pkgdocdir)/doxydoc
 doxyhtmldir = $(doxydocdir)/html
-DocFiles = README README.md AUTHORS AUTHORS.md LICENSE LICENSE.md
+DocFiles = README README.md AUTHORS LICENSE
 COIN_HAS_DOXYGEN = @COIN_HAS_DOXYGEN_TRUE@TRUE
 COIN_HAS_LATEX = @COIN_HAS_LATEX_TRUE@TRUE
 DOXYTAG_EDIT = sed -e 's|@baredocdir_nosub@|$(datarootdir)/doc|g'