Add CContext to store context information while parsing

* For now, it is being used to denote whether to use a semicolon or
      not

src/main/java/ghidrust/decompiler/parser/c/CContext.java

@@ -0,0 +1,9 @@
+package ghidrust.decompiler.parser.c;
+
+public class CContext {
+    public boolean statement_end_sc;
+
+    public CContext() {
+        statement_end_sc = true;
+    }
+}