Don't build -mcpu=common multilib variants of libgcc.a.

From-SVN: r10517

gcc/config/rs6000/t-rs6000

@@ -15,14 +15,8 @@ fp-bit.c: $(srcdir)/config/fp-bit.c
 
 # Build the libraries for both hard and soft floating point
 
-MULTILIB_OPTIONS = msoft-float mcpu=common
-MULTILIB_DIRNAMES = soft-float common
+MULTILIB_OPTIONS = msoft-float
+MULTILIB_DIRNAMES = soft-float
 
 LIBGCC = stmp-multilib
 INSTALL_LIBGCC = install-multilib
-
-# Aix 3.2.x needs milli.exp for -mcpu=common
-EXTRA_PARTS = milli.exp
-milli.exp: $(srcdir)/config/rs6000/milli.exp
-	rm -f milli.exp
-	cp $(srcdir)/config/rs6000/milli.exp ./milli.exp