Allow export statements in AnyVal #32569

Job	Run time
test	53m 13s
test_non_bootstrapped	0s
test_windows_fast	33m 34s
test_scala2_library_tasty	0s
MiMa	10m 35s
test_windows_full	0s
community_build_a	53m 52s
community_build_b	1h 24m 49s
community_build_c	1h 5m 29s
test_sbt	18m 17s
build-msi-package	0s
test_java8	0s
build-sdk-package / build	8m 3s
build-chocolatey-package / build	19s
test-chocolatey-package	0s
publish_nightly	0s
publish_release	0s
nightly_documentation	0s
open_issue_on_failure	0s
	5h 28m 11s

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