Added uncompressed rar stream filter.

It supports uncompressed rar only.
The biggest file is automatically selected.

modules/stream_filter/Modules.am

 SOURCES_decomp = decomp.c
 SOURCES_stream_filter_record = record.c
+SOURCES_stream_filter_rar = rar.c
 
 libvlc_LTLIBRARIES += \
    libstream_filter_record_plugin.la \
+   libstream_filter_rar_plugin.la \
    $(NULL)
 if !HAVE_WIN32
 if !HAVE_WINCE