If `JNU_NewStringPlatform` fails to allocate new Java String object for printer 
name, `std::bad_alloc` is thrown. The handler for the exception does not 
release the local reference to the `nameArray`, thus it will be leaked.

-------------

Commit messages:
 - 8263893: getPrinterNames() leaks nameArray if Java String allocation fails

Changes: https://git.openjdk.java.net/jdk/pull/3096/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3096&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8263893
  Stats: 4 lines in 1 file changed: 4 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3096.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3096/head:pull/3096

PR: https://git.openjdk.java.net/jdk/pull/3096

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