Evan Haas bf0d436087
stdlib: Add Intel HEX support to InstallRawStep
This allows writing HEX files with `exe.installRaw`, where `exe` is a
`LibExeObjStep`. A HEX file will be written if the file extension is `.hex`
or `.ihex`, otherwise a binfile will be written. The output format can be
explicitly chosen with `exe.installRawWithFormat("filename", .hex);`
(or `.bin`)

Part of #2826

Co-authored-by: Akbar Dhanaliwala <akbar.dhanaliwala@gmail.com>
2021-09-01 12:21:22 -07:00
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