Flagless finally comes to jvm tests

Author: som-snytt

test/files/jvm/bytecode-test-example.flags

@@ -1,3 +1,4 @@
+// scalac: -opt:l:none
 class Foo_1 {
   def foo(x: AnyRef): Int = {
     val bool = x == null

test/files/jvm/bytecode-test-example/Foo_1.scala

@@ -1,3 +1,4 @@
+// scalac: -opt:l:none
 import scala.tools.partest.BytecodeTest
 
 import scala.tools.nsc.util.JavaClassPath

test/files/jvm/bytecode-test-example/Test.scala

@@ -1,9 +1,8 @@
-import scala.tools.partest.BytecodeTest
-import scala.tools.asm
-import asm.ClassReader
-import asm.tree
-import scala.collection.JavaConverters._
+// scalac: -opt:l:method -Xlint
+import scala.jdk.CollectionConverters._
 import scala.reflect.{classTag, ClassTag}
+import scala.tools.asm, asm.ClassReader, asm.tree
+import scala.tools.partest.BytecodeTest
 
 object Test extends BytecodeTest {
   def internalName[T <: AnyRef : ClassTag]: String =

test/files/jvm/matchbox.flags

@@ -1,3 +1,4 @@
+// scalac: -opt:l:method
 object Matchbox {
   import scala.{specialized => sp}
 

test/files/jvm/matchbox/Test.scala

@@ -1,3 +1,4 @@
+// scalac: -deprecation
 import scala.tools.partest.BytecodeTest
 import scala.jdk.CollectionConverters._