Remove the existing installation of Homebrew for tests with MacPorts.
Allow also to run the CI on demand manually.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Clean also some other compiler options for basicapitest.
Fixes: 3ab8dcbf72 ("Use Apple Accelerate framework [...]")
Signed-off-by: Stefan Weil <sw@weilnetz.de>