Update t-sparc, t-sol2 etc. for automatic dependencies
* config/t-sol2 (sol2-c.o): Remove header dependencies.
Use $(COMPILE) and $(POSTCOMPILE).
(sol2-cxx.o): Likewise.
(sol2-stubs.o): Likewise.
(sol2.o): Likewise.
* config/x-solaris (host-solaris.o): Likewise.
* config/sparc/t-sparc (sparc.o): Remove.
(sparc-c.o): Remove header dependencies.
Use $(COMPILE) and $(POSTCOMPILE).
* config/sparc/x-sparc: Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@203111 138bc75d-0d04-0410-961f-82ee72b054a4