system/utils: add 'cat' command warning msg
system/utils: add 'cat' command warning msg

When using the 'cat' command, an error may occur if you use data that is
larger than the size allocated to the buffer. If you apply this patch,
it will print a message and quit in that case.

Change-Id: I82742dfb3a44aa10b3b3ae03f0e06d921b35e0c0
Signed-off-by: Junhwan Park <7fee488b6f78fc50b291ffc7d10428788977e877@samsung.com>

JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT