[WCNCR00146539] misc: add Source Insight project files into .gitignore

[Description]
Add Source Insight project files into .gitignore to avoid
unnecessary tracking actions on those files

Change-Id: I400c46715098d37869474bc56748ed5b537777b7
Feature: misc
Signed-off-by: Awk Jiang <awk.jiang@mediatek.com>
CR-Id: WCNCR00146539
diff --git a/.gitignore b/.gitignore
index af6e55e..284fb09 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,3 +16,16 @@
 *.xls
 *.d
 *.tmp
+
+# source insight project files
+*.IAB
+*.IAD
+*.IMB
+*.IMD
+*.PFI
+*.PO
+*.PR
+*.PRI
+*.PS
+*.SearchResults
+*.WK3