Fix for building md5-x86_64.pl with recent gcc and binutils (as first discovered
on my Fedora 13 machine).

Patch taken from upstream bug tracker:
http://rt.openssl.org/Ticket/Display.html?id=2094&user=guest&pass=guest

This issue is marked as resolved upstream (on 13/11/2009) so we should be able
to remove this patch when we update openssl.

JL - 07/05/2010

Index: openssl-0.9.8g/crypto/md5/asm/md5-x86_64.pl
===================================================================
--- openssl-0.9.8g.orig/crypto/md5/asm/md5-x86_64.pl	2010-05-07 00:24:16.000000000 +0100
+++ openssl-0.9.8g/crypto/md5/asm/md5-x86_64.pl	2010-05-07 00:26:25.639809341 +0100
@@ -19,6 +19,7 @@
 sub round1_step
 {
     my ($pos, $dst, $x, $y, $z, $k_next, $T_i, $s) = @_;
+    $T_i = unpack("l",pack("l", hex($T_i))); # convert to 32-bit signed decimal
     $code .= " mov	0*4(%rsi),	%r10d		/* (NEXT STEP) X[0] */\n" if ($pos == -1);
     $code .= " mov	%edx,		%r11d		/* (NEXT STEP) z' = %edx */\n" if ($pos == -1);
     $code .= <<EOF;
@@ -42,6 +43,7 @@
 sub round2_step
 {
     my ($pos, $dst, $x, $y, $z, $k_next, $T_i, $s) = @_;
+    $T_i = unpack("l",pack("l", hex($T_i))); # convert to 32-bit signed decimal
     $code .= " mov	1*4(%rsi),	%r10d		/* (NEXT STEP) X[1] */\n" if ($pos == -1);
     $code .= " mov	%ecx,		%r11d		/* (NEXT STEP) y' = %ecx */\n" if ($pos == -1);
     $code .= <<EOF;
@@ -65,6 +67,7 @@
 sub round3_step
 {
     my ($pos, $dst, $x, $y, $z, $k_next, $T_i, $s) = @_;
+    $T_i = unpack("l",pack("l", hex($T_i))); # convert to 32-bit signed decimal
     $code .= " mov	5*4(%rsi),	%r10d		/* (NEXT STEP) X[5] */\n" if ($pos == -1);
     $code .= " mov	%ecx,		%r11d		/* (NEXT STEP) y' = %ecx */\n" if ($pos == -1);
     $code .= <<EOF;
@@ -87,6 +90,7 @@
 sub round4_step
 {
     my ($pos, $dst, $x, $y, $z, $k_next, $T_i, $s) = @_;
+    $T_i = unpack("l",pack("l", hex($T_i))); # convert to 32-bit signed decimal
     $code .= " mov	0*4(%rsi),	%r10d		/* (NEXT STEP) X[0] */\n" if ($pos == -1);
     $code .= " mov	\$0xffffffff,	%r11d\n" if ($pos == -1);
     $code .= " xor	%edx,		%r11d		/* (NEXT STEP) not z' = not %edx*/\n"