[syn] Add gitignore file to dc folder

Signed-off-by: Michael Schaffner <msf@google.com>
diff --git a/hw/syn/tools/dc/.gitignore b/hw/syn/tools/dc/.gitignore
new file mode 100644
index 0000000..d22bf8a
--- /dev/null
+++ b/hw/syn/tools/dc/.gitignore
@@ -0,0 +1,9 @@
+DDC
+NETLISTS
+REPORTS*
+WORK
+alib*
+*.png
+*.log
+*.rpt
+*.txt