Tweak ENC_TRANS_SO_D

It corresponds to TRANSSODIR, that contains `$(arch)`, so should
contain it as well.

Author: nobu

enc/Makefile.in

@@ -24,8 +24,8 @@ OBJEXT = @OBJEXT@
 LIBEXT = @LIBEXT@
 EXEEXT = @EXEEXT@
 TIMESTAMPDIR  = $(EXTOUT)/.timestamp
-ENC_TRANS_D   = $(TIMESTAMPDIR)/.enc-trans.time
-ENC_TRANS_SO_D = $(TIMESTAMPDIR)/.enc-trans.so.time
+ENC_TRANS_D   = $(TIMESTAMPDIR)/enc-trans.time
+ENC_TRANS_SO_D = $(TIMESTAMPDIR)/enc-trans-$(arch).time
 
 BUILTIN_ENCS	= enc/ascii.c enc/us_ascii.c\
 		  enc/unicode.c enc/utf_8.c