Fail to mark variable as static lifetime

[owen-mc-diffblue]

Steps to reproduce:

1. Create a.java:
   class a { public static void fun() { assert(b.x > 5); } }
2. Create b.java:
   public class b { static int x =5; }
3. Compile a.java, which also compiles b.java:
   javac a.java
4. Rename b.class:
   mv b.class b.class.bak
5. Run cbmc on a.class with the flags --function a.fun --cover branch --show-goto-functions and observe that b.x is used without ever being initialised to a NONDET(int).
6. Run cbmc on a.class with the flags --function a.fun --cover branch --show-symbol-table and observe that b.x is in the symbol table but not marked as is_static_lifetime.

I believe the problem is that typecheck_expr_symbol() in java_bytecode/java_bytecode_typecheck_expr.cpp isn't passed any information about whether the symbol is static, even if we know it's called with getstatic.