Make git ignore generated files and bak files, patch mostly by Mike Frysinger.

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4606 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

.gitignore

@@ -1,9 +1,15 @@
+*~
+*.bak
 *.o
 .deps
 .libs
 Makefile
 Makefile.in
 
+core
+.gdb_history
+.gdbinit
+
 /ABOUT-NLS
 /INSTALL
 /aclocal.m4

ChangeLog

@@ -2,6 +2,7 @@
 	* src/Makefile.am - Rename 'INCLUDES' to 'AM_CPPFLAGS', since
 	Automake changed the naming of these a while ago, and at least
 	version 1.13 now starts warning about it.
+	* .gitignore - Ignore generated files (and bak files).
 
 2014-02-25  Benno Schulenberg  <bensberg@justemail.net>
 	* src/files.c (write_lockfile, do_lockfile) - Fix a typo reported