Port of lib/libcrypto/perlasm/x86gas.pl r1.5.

Avoids build failure for sysutils/borgbackup/2.0 on i386:
ld.lld: error: relocation R_386_PC32 cannot be used against symbol OPENSSL_ia32cap_P; recompile with -fPIC

Index: crypto/perlasm/x86gas.pl
--- crypto/perlasm/x86gas.pl.orig
+++ crypto/perlasm/x86gas.pl
@@ -166,10 +166,8 @@ sub ::file_end
 	}
     }
     if (grep {/\b${nmdecor}OPENSSL_ia32cap_P\b/i} @out) {
-	my $tmp=".comm\t${nmdecor}OPENSSL_ia32cap_P,16";
-	if ($::macosx)	{ push (@out,"$tmp,2\n"); }
-	elsif ($::elf)	{ push (@out,"$tmp,4\n"); }
-	else		{ push (@out,"$tmp\n"); }
+	push (@out, ".extern\t${nmdecor}OPENSSL_ia32cap_P\n");
+	push (@out, ".hidden\t${nmdecor}OPENSSL_ia32cap_P\n");
     }
     push(@out,$initseg) if ($initseg);
 }