[8u-dev] Backport approval for 8029548, 8031092, 8048063, 8050804

[Mandy Chung]

This is to request backport of the following bug fixes in JDK 9:

JDK-8029548 (jdeps) use @jdk.Exported to determine supported vs JDK internal API
JDK-8031092 jdeps does not recognize --help option.
JDK-8048063 (jdeps) Add filtering capability
JDK-8050804: (jdeps) Recommend supported API to replace use of JDK internal API

Review discussion:
http://mail.openjdk.java.net/pipermail/core-libs-dev/2014-July/027570.html
http://mail.openjdk.java.net/pipermail/core-libs-dev/2014-July/027789.html

Since langtools is built with JDK n-1, the backport requires
modification to replace use of the JDK 8 APIs and lambda after
I imported the two changesets.

Webrev showing just jdk8u to jdk9 diff:
    http://cr.openjdk.java.net/~mchung/jdk8u/webrevs/8029548%2b8050804/jdk9-jdk8u-diff/

The full webrevs for two changesets are:
    http://cr.openjdk.java.net/~mchung/jdk8u/webrevs/8029548%2b8050804/

Daniel - can you please review the 8u40 patch (the jdk8u to jdk9 diff
may be the best way to see the changes).

thanks
Mandy