.gitignore: Ignore the autoreconf artifacts
diff --git a/.gitignore b/.gitignore
index e280e7c..18696e7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -42,9 +42,12 @@
 .deps/
 .dirstamp
 Makefile
+autom4te.cache/
 config.h
+config.h.in~
 config.log
 config.status
+configure~
 libpng-config
 libpng.pc
 libpng.vers