Fix up bn_prime.pl formatting.

Align at 5 characters, not 4. There are 5-digit numbers in the output.
Also avoid emitting an extra blank line and trailing whitespace.
Reviewed-by: NKurt Roeckx <kurt@openssl.org>
Reviewed-by: NMatt Caswell <matt@openssl.org>

crypto/bn/bn_prime.pl

@@ -38,9 +38,9 @@ loop: while ($#primes < $num-1) {
 print "typedef unsigned short prime_t;\n";
 printf "# define NUMPRIMES %d\n\n", $num;
 
-printf "static const prime_t primes[%d] = {\n", $num;
+printf "static const prime_t primes[%d] = {", $num;
 for (my $i = 0; $i <= $#primes; $i++) {
-    printf "\n    " if ($i % 8) == 0;
-    printf "%4d, ", $primes[$i];
+    printf "\n   " if ($i % 8) == 0;
+    printf " %5d,", $primes[$i];
 }
 print "\n};\n";