Exclude bison generated files in .gitignore
diff --git a/.gitignore b/.gitignore
index d93c202..153aa04 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,8 @@
 *.so
 *.exe
 tags
+glslang/MachineIndependent/glslang_tab.cpp
+glslang/MachineIndependent/glslang_tab.cpp.h
 build/
 Test/localResults/
 Test/multiThread.out