build_merged_noto: use 'in' to check substrings instead of s.find('x') >= 0
build_merged_noto: use 'in' to check substrings instead of s.find('x') >= 0

more pythonic

googlei18n/noto-source,googlefonts/noto-source,googlei18n/noto-source,googlefonts/noto-source,googlei18n/noto-source,googlefonts/noto-source