Add dlmalloc 2.8.6

Add malloc.c 2.8.6 from https://gee.cs.oswego.edu/pub/misc/malloc.c

Signed-off-by: Imre Kis <imre.kis@arm.com>
Change-Id: Ide79c3d0b2e463f18f992d25a8bd9796b807a5b7
1 file changed