Re: CFT: [build] Move crtstuff support to toplevel libgcc

[Jason Merrill]

This broke bootstrap on powerpc64-unknown-linux-gnu, due to a couple of 
problems with t-ppccomm.  I fixed the missing backslashes, but the 
startup file recipes are clearly wrong as well:

ecrti$(objext): $(srcdir)/config/rs6000/eabi-ci.S
        $(crt_compile) -c ecrti.S
Note that they try to compile a source file which no longer exists.

Jason