efi_loader: suppress executable stack warning

When linking EFI binaries the linker emits:

    ld.bfd: warning: lib/efi_loader/efi_crt0.o:
    missing .note.GNU-stack section implies executable stack

Suppress the warning.

Signed-off-by: Heinrich Schuchardt <[email protected]>

Author: xypron

scripts/Makefile.lib

@@ -426,8 +426,8 @@ $(obj)/%.efi: $(obj)/%_efi.so
 	$(call cmd,efi_objcopy)
 
 quiet_cmd_efi_ld = LD      $@
-cmd_efi_ld = $(LD) -nostdlib -znocombreloc -T $(EFI_LDS_PATH) -shared \
-		-Bsymbolic -znorelro -s $^ -o $@
+cmd_efi_ld = $(LD) -nostdlib -zexecstack -znocombreloc -T $(EFI_LDS_PATH) \
+		-shared -Bsymbolic -znorelro -s $^ -o $@
 
 EFI_LDS_PATH = $(srctree)/arch/$(ARCH)/lib/$(EFI_LDS)