tests: qemucapabilities: Add data for qemu 2.7.0

As of (v2.7.0-rc1-52-g42e0d60)

tests/qemucapabilitiestest.c

@@ -115,6 +115,7 @@ mymain(void)
     DO_TEST("x86_64", "caps_2.4.0");
     DO_TEST("x86_64", "caps_2.5.0");
     DO_TEST("x86_64", "caps_2.6.0");
+    DO_TEST("x86_64", "caps_2.7.0");
     DO_TEST("aarch64", "caps_2.6.0-gicv2");
     DO_TEST("aarch64", "caps_2.6.0-gicv3");
     DO_TEST("ppc64le", "caps_2.6.0");