cmake files: change keywords to lower case

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit f89bf02c54)

CMakeLists.txt

@@ -51,16 +51,16 @@ tde_setup_paths( )
 option( WITH_ALL_OPTIONS    "Enable all optional support" OFF )
 option( WITH_GCC_VISIBILITY "Enable fvisibility and fvisibility-inlines-hidden" ${WITH_ALL_OPTIONS} )
 
-OPTION( WITH_LIBLTDL        "Build with libltdl"                     OFF )
-OPTION( WITH_ALSA_SINK      "Build with alsa sink"                   ${WITH_ALL_OPTIONS} )
-OPTION( WITH_JACK_SINK      "Build with jack sink"                   ${WITH_ALL_OPTIONS} )
-OPTION( WITH_PULSE_SINK     "Build with pulseaudio sink"             ${WITH_ALL_OPTIONS} )
-OPTION( WITH_OSS_SINK       "Build with oss sink"                    ${WITH_ALL_OPTIONS} )
-OPTION( WITH_SUN_SINK       "Build with sun sink"                    OFF )
-OPTION( WITH_FFMPEG_DECODER "Build with ffmpeg decoder"              OFF )
+option( WITH_LIBLTDL        "Build with libltdl"                     OFF )
+option( WITH_ALSA_SINK      "Build with alsa sink"                   ${WITH_ALL_OPTIONS} )
+option( WITH_JACK_SINK      "Build with jack sink"                   ${WITH_ALL_OPTIONS} )
+option( WITH_PULSE_SINK     "Build with pulseaudio sink"             ${WITH_ALL_OPTIONS} )
+option( WITH_OSS_SINK       "Build with oss sink"                    ${WITH_ALL_OPTIONS} )
+option( WITH_SUN_SINK       "Build with sun sink"                    OFF )
+option( WITH_FFMPEG_DECODER "Build with ffmpeg decoder"              OFF )
 option( WITH_MPC_DECODER    "Build with musepack decoder"            ${WITH_ALL_OPTIONS} )
 option( WITH_MPEG_DECODER   "Build with mpeg decoder"                ${WITH_ALL_OPTIONS} )
-OPTION( WITH_SRC_RESAMPLER  "Build with src resampler"               ${WITH_ALL_OPTIONS} )
+option( WITH_SRC_RESAMPLER  "Build with src resampler"               ${WITH_ALL_OPTIONS} )
 option( WITH_XIPH_DECODER   "Build with xiph decoder"                ${WITH_ALL_OPTIONS} )
 option( WITH_XIPH_FLAC      "Build xiph decoder with flac support"   ON )
 option( WITH_XIPH_SPEEX     "Build xiph decoder with speex support"  ON )