Hello,

Many of the still existing TM files (the others are done for 
consistency) are just acting as an indirect include of another file. 
For instance, tm-nbsd.h #includes "solib.h".  This patch tweaks 
configure.in so that a TM_FILE can explicitly specify any file (instead 
of having to pull it in via an #include) - that lets us eliminate both 
the indirection and the unnecessary config file.

It then tweaks arm/nbsd.mt to make use of this, letting arm/tm-nbsd.h be 
eliminated.  More to follow.

committed,
Andrew