s390: Fix build when using EXEEXT_FOR_BUILD

Suffix the s390-mkopc build utility executable file name with
EXEEXT_FOR_BUILD. Otherwise it cannot be located when building with
EXEEXT_FOR_BUILD. Use pattern used for other architecture build
utilities and compile and link s390-mkopc in two steps.

While at it also specify the dependencies of s390-mkopc.c.

opcodes/
	* Makefile.am: Add target to build s390-mkopc.o. Correct
	  target to build s390-mkopc$(EXEEXT_FOR_BUILD).
	* Makefile.in: Regenerate.

Signed-off-by: Jens Remus <jremus@linux.ibm.com>
Reviewed-by: Andreas Krebbel <krebbel@linux.ibm.com>

opcodes/Makefile.am

@@ -583,8 +583,11 @@ opc2c$(EXEEXT_FOR_BUILD): opc2c.o $(BUILD_LIBS_DEPS)
 opc2c.o: opc2c.c $(INCDIR)/libiberty.h
 	$(AM_V_CC)$(COMPILE_FOR_BUILD) -c $(srcdir)/opc2c.c
 
-s390-mkopc$(EXEEXT_FOR_BUILD): s390-mkopc.c
-	$(AM_V_CCLD)$(COMPILE_FOR_BUILD) -o s390-mkopc $(srcdir)/s390-mkopc.c
+s390-mkopc$(EXEEXT_FOR_BUILD): s390-mkopc.o
+	$(AM_V_CCLD)$(LINK_FOR_BUILD) s390-mkopc.o
+
+s390-mkopc.o: s390-mkopc.c $(INCDIR)/opcode/s390.h
+	$(COMPILE_FOR_BUILD) -c $(srcdir)/s390-mkopc.c
 
 s390-opc.tab: s390-mkopc$(EXEEXT_FOR_BUILD) s390-opc.txt
 	$(AM_V_GEN)./s390-mkopc$(EXEEXT_FOR_BUILD) < $(srcdir)/s390-opc.txt > s390-opc.tab

opcodes/Makefile.in

@@ -1551,8 +1551,11 @@ opc2c$(EXEEXT_FOR_BUILD): opc2c.o $(BUILD_LIBS_DEPS)
 opc2c.o: opc2c.c $(INCDIR)/libiberty.h
 	$(AM_V_CC)$(COMPILE_FOR_BUILD) -c $(srcdir)/opc2c.c
 
-s390-mkopc$(EXEEXT_FOR_BUILD): s390-mkopc.c
-	$(AM_V_CCLD)$(COMPILE_FOR_BUILD) -o s390-mkopc $(srcdir)/s390-mkopc.c
+s390-mkopc$(EXEEXT_FOR_BUILD): s390-mkopc.o
+	$(AM_V_CCLD)$(LINK_FOR_BUILD) s390-mkopc.o
+
+s390-mkopc.o: s390-mkopc.c $(INCDIR)/opcode/s390.h
+	$(COMPILE_FOR_BUILD) -c $(srcdir)/s390-mkopc.c
 
 s390-opc.tab: s390-mkopc$(EXEEXT_FOR_BUILD) s390-opc.txt
 	$(AM_V_GEN)./s390-mkopc$(EXEEXT_FOR_BUILD) < $(srcdir)/s390-opc.txt > s390-opc.tab