e16713d877
Summary: The llvm-readobj prints extra characters for the timestamp when --file-headers is used with an XCOFF file. This change updates the format string used to print the time. In addition, the timestamp is printed in the local timezone, and a thread-safe call is used to convert the time. Summit the patch on behalf of Stephen Peckham. Reviewers: James Henderson, Digger Lin Differential Revision: https://reviews.llvm.org/D144281