v2.1.21

2.1.21 (2019-01-10)

Bug Fixes

• Fixed infinite loop in BuildInstructions.file by removing the method and
  replacing all .file accesses with equivalent .filename accesses. Also
  renamed file_abs to filename_abs.
• Fixed bug in blueprint construction that caused source name and dependent
  image names to be swapped with one another.
• Fixed use-before-defined in gcov coverage extractor.