Add FAIL message when memcheck fails to make it clearer as to which executable failed the memcheck test.
Add FAIL message when memcheck fails to make it clearer as to which executable failed the memcheck test.

hsorby/libcellml,libcellml/buildbot-testing,cellml/libcellml,hsorby/libcellml,cellml/libcellml,nickerso/libcellml,nickerso/libcellml,hsorby/libcellml,MichaelClerx/libcellml,MichaelClerx/libcellml,libcellml/buildbot-testing,nickerso/libcellml,MichaelClerx/libcellml,cellml/libcellml,nickerso/libcellml,hsorby/libcellml,cellml/libcellml