Fix solver names for real this time

src/main/scala/leon/solvers/smtlib/SMTLIBCVC4CounterExampleTarget.scala

@@ -15,6 +15,8 @@ import smtlib.parser.Terms._
 trait SMTLIBCVC4CounterExampleTarget extends SMTLIBCVC4QuantifiedTarget {
   this: SMTLIBSolver =>
 
+  override val targetName = "cvc4-cex"
+
   override def interpreterOps(ctx: LeonContext) = {
     Seq(
       "-q",

src/main/scala/leon/solvers/smtlib/SMTLIBCVC4ProofTarget.scala

@@ -15,6 +15,8 @@ import smtlib.parser.Terms._
 trait SMTLIBCVC4ProofTarget extends SMTLIBCVC4QuantifiedTarget {
   this: SMTLIBSolver =>
 
+  override val targetName = "cvc4-proof"
+
   override def interpreterOps(ctx: LeonContext) = {
     Seq(
       "-q",

src/main/scala/leon/solvers/smtlib/SMTLIBCVC4QuantifiedTarget.scala

@@ -16,7 +16,7 @@ import smtlib.theories.Core.Equals
 trait SMTLIBCVC4QuantifiedTarget extends SMTLIBCVC4Target {
   this: SMTLIBSolver =>
 
-  override val targetName = "cvc4-proof"
+  override val targetName = "cvc4-quantified"
 
   private val typedFunDefExplorationLimit = 10000