[make] properly prefix the spotless path with BUILDROOT
[make] properly prefix the spotless path with BUILDROOT

Change-Id: I3cbda4c95751124252bc535a82a78bc6a6c7f8f5

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