[test suite] add lcov html results for gcov profile coverage in --enable-profile-coverage mode
[test suite] ensure the fko multi-call wrapper is executed under valgrind
fix automake subdir-objects warning on Mac OS X, fixes part of #115
[extras] allow configure wrapper to pass on args to the configure script
for --enable-profile-coverage add -lgcov to LDFLAGS and remove -O0 optimization switch