ignore generated files

BUG=None
TEST=`git status` no longer shows compiled files

Change-Id: I2bbaf4ebdf7212000cb0e85719785772f1e3ec2c
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..3604e59
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+/configs/
+/em100
+/em100pro_chips.h
+/makechips