emacs: terminal: don't use "brightwhite" color
emacs: terminal: don't use "brightwhite" color

This is for Mac. In a Mac terminal, even though "brightwhite" is
available as a color name when we do M-x list-colors-display, it is for
some reason unrecognized on startup. This results in the daemon refusing
to open a buffer.

listx/syscfg,listx/syscfg,listx/syscfg,listx/syscfg,listx/syscfg