added basic dataflow analysis to skslc

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2405383003

Review-Url: https://codereview.chromium.org/2405383003
diff --git a/src/sksl/SkSLSPIRVCodeGenerator.h b/src/sksl/SkSLSPIRVCodeGenerator.h
index 2800a86..e6fc28e 100644
--- a/src/sksl/SkSLSPIRVCodeGenerator.h
+++ b/src/sksl/SkSLSPIRVCodeGenerator.h
@@ -34,8 +34,8 @@
 #include "ir/SkSLStatement.h"
 #include "ir/SkSLSwizzle.h"
 #include "ir/SkSLTernaryExpression.h"
-#include "ir/SkSLVarDeclaration.h"
-#include "ir/SkSLVarDeclarationStatement.h"
+#include "ir/SkSLVarDeclarations.h"
+#include "ir/SkSLVarDeclarationsStatement.h"
 #include "ir/SkSLVariableReference.h"
 #include "spirv.h"