[lib][heap] make the heap 64bit safe, only put magic value if needed
[lib][heap] make the heap 64bit safe, only put magic value if needed

GCrean/lk,grub4android/lk,travisg/lk,minglun-tsai/lk,nvll/lk,travisg/lk,grub4android/lk,minglun-tsai/lk,sndnvaps/lk,ErikCorryGoogle/lk,grub4android/lk,srodrig1/lk,srodrig1/lk,GCrean/lk,skabet/lk,ErikCorryGoogle/lk,M1cha/lk,nvll/lk,hollanderic/lkstuff,sndnvaps/lk,grub4android/lk,nvll/lk,M1cha/lk,travisg/lk,sndnvaps/lk,GCrean/lk,hollanderic/lkstuff,skabet/lk,minglun-tsai/lk,GCrean/lk,ErikCorryGoogle/lk,hollanderic/lkstuff,littlekernel/lk,littlekernel/lk,littlekernel/lk,littlekernel/lk,skabet/lk,srodrig1/lk,grub4android/lk,minglun-tsai/lk,GCrean/lk,srodrig1/lk,sndnvaps/lk,srodrig1/lk,hollanderic/lkstuff,travisg/lk,skabet/lk,nvll/lk,sndnvaps/lk,M1cha/lk,M1cha/lk,nvll/lk,ErikCorryGoogle/lk,M1cha/lk,skabet/lk