RFR: JDK-8297688: libjli leaks memory related to options handling [v2]

[Justin King]

> Fix memory leaks by making `AddOption` unconditionally duplicate passed in strings, taking ownership. Callers using dynamic memory free their storage after calling `AddOption`. This ensures no memory is dropped on the floor. This also removes the second argument to `AddOption` as it is unused and shifts it into the source file.

Justin King has updated the pull request incrementally with one additional commit since the last revision:

  Maintain separate list of dynamically allocated option strings
  
  Signed-off-by: Justin King <jcking at google.com>

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Changes:
  - all: https://git.openjdk.org/jdk/pull/11384/files
  - new: https://git.openjdk.org/jdk/pull/11384/files/cbd06fda..564d1733

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=11384&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11384&range=00-01

  Stats: 48 lines in 1 file changed: 26 ins; 9 del; 13 mod
  Patch: https://git.openjdk.org/jdk/pull/11384.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11384/head:pull/11384

PR: https://git.openjdk.org/jdk/pull/11384