Don't add afalg engine if configured "no-engine"

Also, indent a little deeper, for clarity.

Reviewed-by: Matt Caswell <matt@openssl.org>

engines/afalg/build.info

@@ -1,5 +1,6 @@
 {- use File::Spec::Functions qw/:DEFAULT rel2abs/; -}
 
+IF[{- !$disabled{"engine"} -}]
   IF[{- !$disabled{afalg} -}]
     IF[{- $disabled{"dynamic-engine"} -}]
       LIBS=../../libcrypto
@@ -11,3 +12,4 @@ IF[{- !$disabled{afalg} -}]
       INCLUDE[afalg]= {- rel2abs(catdir($builddir,"../../include")) -} ../../include
     ENDIF
   ENDIF
+ENDIF