8256499: Zero: enable Epsilon GC

Reviewed-by: rkennke, ihse

Author: shipilev

make/autoconf/jvm-features.m4

@@ -476,7 +476,7 @@ AC_DEFUN([JVM_FEATURES_PREPARE_VARIANT],
     JVM_FEATURES_VARIANT_UNAVAILABLE="cds minimal zero"
   elif test "x$variant" = "xzero"; then
     JVM_FEATURES_VARIANT_UNAVAILABLE="aot cds compiler1 compiler2 \
-        epsilongc g1gc graal jvmci minimal shenandoahgc zgc"
+        g1gc graal jvmci minimal shenandoahgc zgc"
   else
     JVM_FEATURES_VARIANT_UNAVAILABLE="minimal zero"
   fi