gitignore configure~, config.h.in~ (LudovicRousseau#136)

Add the "configure~" and "config.h.in~" files to .gitignore. These files
are produced after running "bootstrap" more than once, and don't need to
be committed.

Author: emaxx-google

.gitignore

@@ -12,10 +12,12 @@ compile
 config.guess
 config.h
 config.h.in
+config.h.in~
 config.log
 config.status
 config.sub
 configure
+configure~
 depcomp
 doc/Makefile
 doc/Makefile.in