[Java] Drop old GCC compilers
[Java] Drop old GCC compilers

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