kernel/Makefile: don't assume that kernel/gen_ikh_data.sh is executable

If the user downloads and applies patch-5.1.gz using patch(1), the x bit
on kernel/gen_ikh_data.sh is not set.

  /bin/sh: 1: ./kernel/gen_ikh_data.sh: Permission denied

Fix this by using CONFIG_SHELL.

Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Author: akpm00

kernel/Makefile

@@ -127,7 +127,7 @@ $(obj)/config_data.gz: $(KCONFIG_CONFIG) FORCE
 $(obj)/kheaders.o: $(obj)/kheaders_data.tar.xz
 
 quiet_cmd_genikh = CHK     $(obj)/kheaders_data.tar.xz
-cmd_genikh = $(srctree)/kernel/gen_ikh_data.sh $@
+cmd_genikh = $(CONFIG_SHELL) $(srctree)/kernel/gen_ikh_data.sh $@
 $(obj)/kheaders_data.tar.xz: FORCE
 	$(call cmd,genikh)