[PATCH kvm-unit-tests v2] powerpc: fix boot_rom.bin build

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My powerpc objcopy (version 2.23.52.20130305) did a seek() that
bash process substitution couldn't handle! I've changed the
Makefile to do things the old fashioned way.

Signed-off-by: Peter Feiner <pfeiner@xxxxxxxxxx>

---

v2:
	* rm the temporary file
	* renamed temporary file to .tmp instead of .suffix
---
 powerpc/Makefile.common | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/powerpc/Makefile.common b/powerpc/Makefile.common
index 424983e..2074289 100644
--- a/powerpc/Makefile.common
+++ b/powerpc/Makefile.common
@@ -48,7 +48,9 @@ FLATLIBS = $(libcflat) $(LIBFDT_archive)
 
 $(TEST_DIR)/boot_rom.bin: $(TEST_DIR)/boot_rom.elf
 	dd if=/dev/zero of=$@ bs=256 count=1
-	$(OBJCOPY) -O binary $^ >(cat - >>$@)
+	$(OBJCOPY) -O binary $^ $@.tmp
+	cat $@.tmp >> $@
+	$(RM) $@.tmp
 
 $(TEST_DIR)/boot_rom.elf: CFLAGS = -mbig-endian
 $(TEST_DIR)/boot_rom.elf: $(TEST_DIR)/boot_rom.o
-- 
2.7.0.rc3.207.g0ac5344

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