Add fixed-length blob option to test/system/blob/blobgen.c
Add fixed-length blob option to test/system/blob/blobgen.c

alco90/soml,lees0414/EUproject,mytestbed/oml,alco90/soml,lees0414/EUproject,alco90/soml,alco90/soml,lees0414/EUproject,alco90/soml,mytestbed/oml,lees0414/EUproject,lees0414/EUproject,mytestbed/oml,mytestbed/oml,mytestbed/oml