Include <cstdio> for printf, etc.

Change-Id: Ibc4e8bc9b165fff1d9e1efdd213442464963e3bc
diff --git a/slang_rs_spec_table.cpp b/slang_rs_spec_table.cpp
index 093c5b4..6ef4e64 100644
--- a/slang_rs_spec_table.cpp
+++ b/slang_rs_spec_table.cpp
@@ -16,6 +16,7 @@
 
 #include <string>
 #include <cstring>
+#include <cstdio>
 
 #define PRIMITIVE_DATA_TYPE_ENUMS                         \
     ENUM_PRIMITIVE_DATA_TYPE(Float16, NULL, 128)          \