mnit simple : apparently, you can't name a sound file "sound"

Signed-off-by: BlackMinou <romain.chanoir@viacesi.fr>

diff --git a/examples/mnit_simple/assets/sound.ogg b/examples/mnit_simple/assets/testsound.ogg
similarity index 100%
rename from examples/mnit_simple/assets/sound.ogg
rename to examples/mnit_simple/assets/testsound.ogg

diff --git a/examples/mnit_simple/res/raw/sound.ogg b/examples/mnit_simple/res/raw/testsound.ogg
similarity index 100%
rename from examples/mnit_simple/res/raw/sound.ogg
rename to examples/mnit_simple/res/raw/testsound.ogg