Fix ASM generating an invalid reference for static methods in interfa…

…ce classes

Static calls to interface methods should use InterfaceMethodRefs instead of MethodRefs. Otherwise, newer JVM versions will throw an IncompatibleClassChangeError.

See openjdk/jdk@c36295e#diff-2e49825df1451e2d44694826a70e86bf1a511371482e4de50f7ef09c300bd9bbR780 and
https://bugs.openjdk.org/browse/JDK-8145148?focusedCommentId=13958798&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-13958798 for more details.

src/main/java/soot/baf/BafASMBackend.java

@@ -1388,7 +1388,7 @@ public void caseClassConstant(ClassConstant v) {
       public void caseStaticInvokeInst(StaticInvokeInst i) {
         SootMethodRef m = i.getMethodRef();
         mv.visitMethodInsn(Opcodes.INVOKESTATIC, slashify(m.declaringClass().getName()), m.name(), toTypeDesc(m),
-            m.declaringClass().isInterface() && !m.isStatic());
+            m.declaringClass().isInterface());
       }
 
       @Override