vala tests: fix spurious failures with older valac (<= 0.7.2)
See automake bug#11093.
The Vala compiler before the 0.7.3 release does not support the
'--profile' option. But some of our tests were relying on it, so
skip those tests if the detected Vala compiler is too old.
* tests/vala-vpath.test, tests/vala-mix.test, tests/vala-mix2.test
(configure.in): Require vala version >= 0.7.3 in AM_PROG_VALAC call.
Co-authored-by: Stefano Lattarini <stefano.lattarini@gmail.com>
Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>