Fix FTBFS because of conflict between config.h generated by automake

and Ruby headers.

Instead of using config.h in Ruby related code, the definitions
related to Ruby version are added to CFLAGS.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit 5daf2fbc51)

lib/kross/configure.in.in

@@ -40,11 +40,14 @@ if test "x$compile_kross" = "xyes" ; then
     fi
 
     RUBY_SERIES="$RUBY_MAJOR$RUBY_MINOR"
+    RUBY_VERSION_DEFS=""
     if test "$RUBY_SERIES" -ge "19"; then
        AC_DEFINE_UNQUOTED(HAVE_RUBY_1_9, 1, [Defines if your system has Ruby 1.9.x])
+       RUBY_VERSION_DEFS="${RUBY_VERSION_DEFS} -DHAVE_RUBY_1_9"
     fi
     if test "$RUBY_SERIES" -ge "30"; then
        AC_DEFINE_UNQUOTED(HAVE_RUBY_3, 1, [Defines if your system has Ruby 3.x])
+       RUBY_VERSION_DEFS="${RUBY_VERSION_DEFS} -DHAVE_RUBY_3"
     fi
 
     if test `${RUBY_EXECUTABLE} -r rbconfig -e "puts RbConfig::CONFIG.key?(%q(rubyhdrdir))"` = "true"; then
@@ -85,6 +88,7 @@ if test "x$compile_kross" = "xyes" ; then
     AC_SUBST(RUBY_LIBRUBYARG)
     AC_SUBST(RUBY_CFLAGS)
     AC_SUBST(RUBY_ENABLESHARED)
+    AC_SUBST(RUBY_VERSION_DEFS)
 
 
     AC_MSG_CHECKING(Ruby shared library)

lib/kross/ruby/Makefile.am

@@ -2,7 +2,7 @@ include $(top_srcdir)/lib/kross/Makefile.global
 
 CXXFLAGS += $(USE_EXCEPTIONS)
 
-INCLUDES = -I$(top_srcdir)/lib/kross -I$(RUBY_INCLUDEDIR) $(RUBY_CFLAGS) $(all_includes)
+INCLUDES = -I$(top_srcdir)/lib/kross -I$(RUBY_INCLUDEDIR) $(RUBY_CFLAGS) $(RUBY_VERSION_DEFS) $(all_includes)
 METASOURCES = AUTO
 kde_module_LTLIBRARIES = krossruby.la
 

lib/kross/ruby/rubyinterpreter.cpp

@@ -17,7 +17,6 @@
  * Boston, MA 02110-1301, USA.
  ***************************************************************************/
 
-#include "config.h"
 #include "rubyinterpreter.h"
 
 #include <map>

lib/kross/ruby/rubywrapper.c

@@ -17,7 +17,6 @@
  * Boston, MA 02110-1301, USA.
  ***************************************************************************/
 
-#include "config.h"
 #include "ruby.h"
 
 void kross_rb_set_safe_level(int safelevel) {