graphics/evolvotron: Update 0.6.3 -> 0.7.1

Port changes:

• Change to DISTVERSION
• Update LICENSE, add LICENSE_FILE
• Change to Qt5
• Add USES=compiler:c++11-lib and USE_CXXSTD=c++11
• Delete redundant static libraries
• Remove MAKE_JOBS_UNSAFE - build doesn't seem to fail with -j8