Add PADLOCK_ASM to dso_defines rather than lib_defines

Since the padlock code is an engine, the assembler is for a module,
not a library link to when building a program...  there's a
distinction.

Fixes #2311
Reviewed-by: NMatt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8220)

(cherry picked from commit 88780b1c5f6000fe6731fec74efe697bcf493b6c)

Configure

@@ -1419,7 +1419,7 @@ unless ($disabled{asm}) {
 	push @{$config{lib_defines}}, "X25519_ASM";
     }
     if ($target{padlock_asm_src} ne $table{DEFAULTS}->{padlock_asm_src}) {
-	push @{$config{lib_defines}}, "PADLOCK_ASM";
+	push @{$config{dso_defines}}, "PADLOCK_ASM";
     }
     if ($target{poly1305_asm_src} ne "") {
 	push @{$config{lib_defines}}, "POLY1305_ASM";