Add cmake-build-debug to .gitignore

Change-Id: I01af2e6f1715b0e9174117d6fb99e9b3651d65bc
diff --git a/.gitignore b/.gitignore
index 7d44471..570aae3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 .idea/
 build/
+cmake-build-debug/
 lib/
 bin/
 CMakeFiles/