[C++] Fix warning and turn of debug by default in AeronArchiveTest.
[C++] Fix warning and turn of debug by default in AeronArchiveTest.

mikeb01/Aeron,real-logic/Aeron,mikeb01/Aeron,EvilMcJerkface/Aeron,real-logic/Aeron,real-logic/Aeron,EvilMcJerkface/Aeron,real-logic/Aeron,mikeb01/Aeron,mikeb01/Aeron,EvilMcJerkface/Aeron,EvilMcJerkface/Aeron