zipl/boot: fix dependencies of stage2 loaders

If the stage2.lds linker script changes we must rebuild all stage2
loaders so let's add stage2.lds as a target dependency.

Reviewed-by: Philipp Rudo <prudo@linux.ibm.com>
Reviewed-by: Jan Höppner <hoeppner@linux.ibm.com>
Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>

zipl/boot/Makefile

@@ -28,20 +28,20 @@ all: data.o data.h tape0.bin stage3.bin
 
 eckd2dump_sv.exec: \
 	head.o stage2dump.o cio.o eckd2dump.o eckd2dump_sv.o \
-	libc.o ebcdic.o sclp.o entry.o
+	libc.o ebcdic.o sclp.o entry.o stage2.lds
 eckd2dump_mv.exec: \
 	head.o stage2dump.o cio.o eckd2dump.o eckd2dump_mv.o \
-	libc.o ebcdic.o sclp.o entry.o
+	libc.o ebcdic.o sclp.o entry.o stage2.lds
 fba2dump.exec: \
 	head.o stage2dump.o cio.o fba2dump.o \
-	libc.o ebcdic.o sclp.o entry.o
+	libc.o ebcdic.o sclp.o entry.o stage2.lds
 tape2dump.exec: \
 	head.o stage2dump.o cio.o tape2dump.o \
-	libc.o ebcdic.o sclp.o entry.o
+	libc.o ebcdic.o sclp.o entry.o stage2.lds
 eckd2.exec: head.o stage2.o cio.o eckd2.o libc.o ebcdic.o menu.o sclp.o \
-	    kdump2.o kdump.o entry.o
+	    kdump2.o kdump.o entry.o stage2.lds
 fba2.exec: head.o stage2.o cio.o fba2.o libc.o ebcdic.o menu.o sclp.o \
-	   kdump2.o kdump.o entry.o
+	   kdump2.o kdump.o entry.o stage2.lds
 stage3.exec: head.o stage3.o kdump3.o libc.o ebcdic.o ebcdic_conv.o sclp.o \
 	     sclp_stage3.o kdump.o entry.o stage3.lds