Adjust platforms to use it. Fix some bugs in the linux386 platform. --HG-- branch : dtrg-experimental-powerpc
Copy rhead() and rsect() from aslod to aelflod, so aelflod can work for machine with 64-bit long. In aelflod, fix ELF header so file(1) no longer reports "corrupted section header size".
when reading the structure header.