[arch] Add necessary include for size_t after reorg.
[arch] Add necessary include for size_t after reorg.

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