Add .gitignore for dhcpl2relay

Change-Id: Icdd4ce62a22d0ef054499aac8e82bb5c069f1c71
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a4f1f28
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,9 @@
+*~
+*.class
+.classpath
+.project
+.settings
+.checkstyle
+target
+*.iml
+.idea