Category listing - tests/portcheck

t1 test 1
t10 test 10
t11 test 11, wrong dependency
t12 test 12, correct handling
t13 test 13
t14 test 14, no stdc++
t15 test 15, GH_COMMIT length
t16 test 16, non-standard top-level categories
t17 test 17
t18 test 18
t2 test 2
t20 test for missing x11/qt5/qtdeclarative dependency
t3 test 3
t4 test 4
t5 test 5
t6 test 6
t7 tempo/pitch audio processing library
t8 test 8
t9 test 9 main