javascript cross compiler reports wrong +RTS --info

ghc@71190504338e:~/ghc$ _build/install/bin/javascript-unknown-ghcjs-ghc +RTS --info
 [("GHC RTS", "YES")
 ,("GHC version", "9.9.20231003")
 ,("RTS way", "rts_thr")
 ,("Build platform", "x86_64-unknown-linux")
 ,("Build architecture", "x86_64")
 ,("Build OS", "linux")
 ,("Build vendor", "unknown")
 ,("Host platform", "x86_64-unknown-linux")
 ,("Host architecture", "x86_64")
 ,("Host OS", "linux")
 ,("Host vendor", "unknown")
 ,("Target platform", "x86_64-unknown-linux")
 ,("Target architecture", "x86_64")
 ,("Target OS", "linux")
 ,("Target vendor", "unknown")
 ,("Word size", "64")
 ,("Compiler unregisterised", "NO")
 ,("Tables next to code", "YES")
 ,("Flag -with-rtsopts", "-K512M -H -I5 -T")
 ]

At least I notice immediately:

Target platform is incorrect
Word size is incorrect

NOTE: This may be an artifact of the branch I am currently working on, so don't try to reproduce if you don't already have a javascript cross-compiler.

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