Remove file name from file headers.It provides no useful information and breaks on renames.
Originally committed as revision 17097 to svn://svn.ffmpeg.org/ffmpeg/trunk
Globally rename the header inclusion guard names.
Consistently apply this rule: the guard name is obtained from thefilename by stripping the leading "lib", converting '/' and '.' to'_' and uppercasing the resulting name. Guard names in the rootdirectory have to be prefixed by "FFMPEG_"....
Originally committed as revision 11077 to svn://svn.ffmpeg.org/ffmpeg/trunk