Update test_elf.bin with a saner one

Replaced test_elf.bin image with one in which the offset of segments
in file (p_offset), the virtual address of the segments (p_vaddr)
and the physical one (p_paddr -> the address where that segment
will be loaded into guest memory) are page-aligned.

Signed-off-by: Laura Loghin <lauralg@amazon.com>

Author: lauralt

DESIGN.md

@@ -5,7 +5,7 @@ The boot process is explained from the following two sides.
 ## Loader side
 
 It follows ELF standard which is specified in elf.rs.
-The entry header and program headers will be inerpreted, and PT_LOAD segments
+The entry header and program headers will be interpreted, and PT_LOAD segments
 will be loaded into guest memory.
 
 ### Where kernel is loaded