Add annotation for addition of c_string_copy type
Add annotation for addition of c_string_copy type

The addition of c_string_copy type to support low-level string memory
management (5c7ad02323fd) on 11/07/14 had a positive performance impact on
regexdna and fasta-printlines.

hildeth/chapel,chizarlicious/chapel,CoryMcCartan/chapel,hildeth/chapel,chizarlicious/chapel,CoryMcCartan/chapel,CoryMcCartan/chapel,hildeth/chapel,CoryMcCartan/chapel,hildeth/chapel,chizarlicious/chapel,chizarlicious/chapel,chizarlicious/chapel,chizarlicious/chapel,CoryMcCartan/chapel,chizarlicious/chapel,CoryMcCartan/chapel,hildeth/chapel,CoryMcCartan/chapel,hildeth/chapel,hildeth/chapel