Add .gitignore

Test: compile
Change-Id: I0e4dd26c07ba5ed5e6ea4acf0fa9c9f831cba534
diff --git a/gd/.gitignore b/gd/.gitignore
new file mode 100644
index 0000000..6cfa2da
--- /dev/null
+++ b/gd/.gitignore
@@ -0,0 +1 @@
+**/default.profraw