[POWERPC] Don't require execute perms on wrapper when building zImage.initrd

Don't require that the wrapper script be executable when building
zImage.initrds.  This has already been fixed for zImages.
Signed-off-by: NMark A. Greer <mgreer@mvista.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

arch/powerpc/boot/Makefile

@@ -115,7 +115,7 @@ endif
 quiet_cmd_wrap	= WRAP    $@
       cmd_wrap	=$(CONFIG_SHELL) $(wrapper) -c -o $@ -p $2 $(CROSSWRAP) vmlinux
 quiet_cmd_wrap_initrd = WRAP    $@
-      cmd_wrap_initrd =$(wrapper) -c -o $@ -p $2 $(CROSSWRAP) \
+      cmd_wrap_initrd =$(CONFIG_SHELL) $(wrapper) -c -o $@ -p $2 $(CROSSWRAP) \
 				-i $(obj)/ramdisk.image.gz vmlinux
 
 $(obj)/zImage.chrp: vmlinux $(wrapperbits)