pc-bios/s390-ccw: link statically

Adding -pie to LDFLAGS caused s390-ccw.img to become dynamically linked.
By using -static-pie it will be linked statically like other bios.

This ensures that the build output doesn't change depending on the
default dynamic loader path of the toolchain.

Fixes: d884c86dcd ("s390/bios: Make the s390-ccw.img relocatable")
Signed-off-by: Sertonix <sertonix@posteo.net>
Message-ID: <DAJ1QOSAP9LS.342SQSM0UZU80@posteo.net>
Signed-off-by: Thomas Huth <thuth@redhat.com>

pc-bios/s390-ccw/Makefile

@@ -47,7 +47,7 @@ EXTRA_CFLAGS += -fwrapv -fno-strict-aliasing -fno-asynchronous-unwind-tables
 EXTRA_CFLAGS += -msoft-float
 EXTRA_CFLAGS += -std=gnu99
 EXTRA_CFLAGS += $(LIBC_INC) $(LIBNET_INC)
-EXTRA_LDFLAGS += -Wl,-pie -nostdlib -z noexecstack -z text
+EXTRA_LDFLAGS += -static-pie -nostdlib -z noexecstack -z text
 
 cc-test = $(CC) -Werror $1 -c -o /dev/null -xc /dev/null >/dev/null 2>/dev/null
 cc-option = if $(call cc-test, $1); then \