[Sandbox] Update Info.plist generator

Plist generator now emits the output to the temporary folder, which we
have write permission to.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>

Audio/PluginController.mm

@@ -515,7 +515,7 @@ - (void)printPluginInfo {
 
     [stringList addObject:plistFooter];
 
-    NSFileHandle *fileHandle = [NSFileHandle fileHandleForWritingAtPath:@"/tmp/Cog_Info.plist" createFile:YES];
+    NSFileHandle *fileHandle = [NSFileHandle fileHandleForWritingAtPath:[NSTemporaryDirectory() stringByAppendingPathComponent:@"Cog_Info.plist"] createFile:YES];
     if (!fileHandle) {
         DLog(@"Error saving Info.plist!");
         return;