Fix the spelling for the project name, from "ffmpeg" to "FFmpeg".

Originally committed as revision 20339 to svn://svn.ffmpeg.org/ffmpeg/trunk

Doxyfile

@@ -17,7 +17,7 @@
 # The PROJECT_NAME tag is a single word (or a sequence of words surrounded
 # by quotes) that should identify the project.
 
-PROJECT_NAME           = ffmpeg
+PROJECT_NAME           = FFmpeg
 
 # The PROJECT_NUMBER tag can be used to enter a project or revision number.
 # This could be handy for archiving the generated documentation or