Desugared library: virtual retargetting

Bug: 142846107
Change-Id: I679fb5d34eb775f288c83991e1a1aa598214fd3b
diff --git a/src/library_desugar/desugar_jdk_libs.json b/src/library_desugar/desugar_jdk_libs.json
index d54bf57..c0ba84f 100644
--- a/src/library_desugar/desugar_jdk_libs.json
+++ b/src/library_desugar/desugar_jdk_libs.json
@@ -1,6 +1,6 @@
 {
   "configuration_format_version": 3,
-  "version": "0.10.0",
+  "version": "0.10.1",
   "required_compilation_api_level": 26,
   "synthesized_library_classes_package_prefix": "j$.",
   "library_flags": [
@@ -16,6 +16,10 @@
         "java.lang.Integer8": "java.lang.Integer",
         "java.lang.Long8": "java.lang.Long",
         "java.lang.Math8": "java.lang.Math"
+      },
+      "retarget_lib_member": {
+        "java.util.Date#toInstant": "java.util.DesugarDate",
+        "java.util.GregorianCalendar#toZonedDateTime": "java.util.DesugarGregorianCalendar"
       }
     },
     {