Set privateWithin when creating java inner classes #1042

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build-msi-package	0s
community_build_a	1s
community_build_b	1s
community_build_c	1s
MiMa	1s
test	1s
test_java8	0s
test_non_bootstrapped	1s
test_sbt	1s
test_scala2_library_tasty	0s
test_windows_fast	1s
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build-sdk-package / build	7m 56s
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build-chocolatey-package / build	22s
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	8m 27s

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