Add m4/.gitignore.

This ensures that the m4 directory exists in the git checkout.

diff --git a/m4/.gitignore b/m4/.gitignore
new file mode 100644 (file)
index 0000000..38066dd
--- /dev/null
+++ b/m4/.gitignore
@@ -0,0 +1,5 @@
+libtool.m4
+ltoptions.m4
+ltsugar.m4
+ltversion.m4
+lt~obsolete.m4