bugfix: Don't accept files other than .class or .jar as binary deps

Should help with scalacenter#2053

The binary is described as:
```
A binary entry represents either the jar or the
concrete class file from which the Scala compiler
knows that <code>onBinaryClassName</code> comes from.
```

Author: tgodzik

backend/src/main/scala/sbt/internal/inc/bloop/internal/BloopAnalysisCallback.scala

@@ -229,7 +229,10 @@ final class BloopAnalysisCallback(
         externalSourceDependency(sourceClassName, targetBinaryClassName, api, context)
       case None =>
         // dependency is some other binary on the classpath
-        externalBinaryDependency(classFile, onBinaryName, sourceFile)
+        val name = classFile.toString()
+        // avoid binary deps which are not one of those
+        if (name.endsWith(".class") || name.endsWith(".jar"))
+          externalBinaryDependency(classFile, onBinaryName, sourceFile)
     }
   }