This patch further cleans up NativeLibraries just for JNI library use. RawNativeLibraries implements its own native load and unload methods. In addition, this also fixes the implementation of `RawNativeLibraries::load` not to throw UnsatisfiedLinkError if a library cannot be loaded for any reason but instead returns null.
------------- Commit messages: - 8282515: More clean up on NativeLibraries just for JNI library use Changes: https://git.openjdk.java.net/jdk/pull/7661/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7661&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8282515 Stats: 275 lines in 6 files changed: 175 ins; 28 del; 72 mod Patch: https://git.openjdk.java.net/jdk/pull/7661.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/7661/head:pull/7661 PR: https://git.openjdk.java.net/jdk/pull/7661
