add new testcase for str.count, when end is out of bounds
add new testcase for str.count, when end is out of bounds

ASP1234/voc,cflee/voc,ASP1234/voc,gEt-rIgHt-jR/voc,gEt-rIgHt-jR/voc,pombredanne/voc,pombredanne/voc,freakboy3742/voc,Felix5721/voc,Felix5721/voc,freakboy3742/voc,cflee/voc