Need to rebuild eboot to pull in PR #6832 changes

As @mcspr noted, eboot is not built as part of the distribution and so PR #6832 has changed the source, but not binary eboot.elf that's pulled in to the linker,

https://github.com/esp8266/Arduino/commit/5b500e4e34ecae3d5aaa61604f8a45326150b022#commitcomment-36205456
