testbot: Give a '.diff' extension to the mailed-in patches.

[Francois Gouget]

This way the web server knows what MIME type to give them and they get opened in an editor on download.
---
 testbot/lib/WineTestBot/Patches.pm |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/testbot/lib/WineTestBot/Patches.pm b/testbot/lib/WineTestBot/Patches.pm
index 11c355f..c2262c7 100644
--- a/testbot/lib/WineTestBot/Patches.pm
+++ b/testbot/lib/WineTestBot/Patches.pm
@@ -207,12 +207,12 @@ sub Submit
     my $NewStep = $Steps->Add();
     # Create a link to the patch file in the staging dir
     my $FileNameRandomPart = GenerateRandomString(32);
-    while (-e ("$DataDir/staging/${FileNameRandomPart}_patch"))
+    while (-e ("$DataDir/staging/${FileNameRandomPart}_patch.diff"))
     {
       $FileNameRandomPart = GenerateRandomString(32);
     }
-    link $PatchFileName, "$DataDir/staging/${FileNameRandomPart}_patch";
-    $NewStep->FileName($FileNameRandomPart . " patch");
+    link $PatchFileName, "$DataDir/staging/${FileNameRandomPart}_patch.diff";
+    $NewStep->FileName($FileNameRandomPart . " patch.diff");
     my @Keys = keys %{$Targets{$BaseName}};
     $NewStep->FileType($Targets{$BaseName}{$Keys[0]});
     $NewStep->InStaging(1);
-- 
1.7.10.4