Build system: ignore generated files

Add files generated by autotools to .gitignore

.gitignore

@@ -7,12 +7,18 @@
 *~
 
 /autom4te.cache
+/m4
+/aux_scripts
 /config.log
 /config.status
 /stamp-h1
 /Makefile
 /config.h
 /libtool
+/configure
+/config.h.in
+/aclocal.m4
+/Makefile.in
 
 /bin/clish
 /bin/konf