Optimize relocation in mkimport

Author: Blackhex

winsup/cygwin/scripts/mkimport

@@ -68,14 +68,13 @@ $glob_sym:
 	jmp	*$imp_sym(%rip)
 EOF
 	} elsif ($is_aarch64) {
-	    # TODO
 	    print $as_fd <<EOF;
 	.text
 	.extern	$imp_sym
 	.global	$glob_sym
 $glob_sym:
-	adr x16, $imp_sym
-	ldr x16, [x16]
+	adrp x16, :got:$imp_sym
+	ldr x16, [x16, :got_lo12:$imp_sym]
 	br x16
 EOF
 	} else {