tests: fix spurious failure in 'primary-prefix-valid-couples.test' * tests/primary-prefix-valid-couples.test: After commit v1.11-464-gc9dfc36, `java_JAVA' is not a valid prefix/primary combination by default anymore: one has to explicitly define $(javadir) to make it so. So just drop `java_JAVA' from our Makefile.am Also, since we are at it, ... (configure.in): ... remove AM_PROG_GCJ from here, as it's not really required.