Add java.lang.invoke to the package whitelist.

Tracks libcore change that adds the first classes from this package
to core-oj.jar. Note that packages need to be whitelisted even if
the classes in question aren't public API.

Test: make checkbuild docs

Change-Id: I917dc63899124ca30bbeb2902787faea6754bb43
diff --git a/core/tasks/check_boot_jars/package_whitelist.txt b/core/tasks/check_boot_jars/package_whitelist.txt
index 1478aae..daf13fe 100644
--- a/core/tasks/check_boot_jars/package_whitelist.txt
+++ b/core/tasks/check_boot_jars/package_whitelist.txt
@@ -8,6 +8,7 @@
 java\.io
 java\.lang
 java\.lang\.annotation
+java\.lang\.invoke
 java\.lang\.ref
 java\.lang\.reflect
 java\.math