Syntax/makefile: Support LineContinue for target line
Syntax/makefile: Support LineContinue for target line

e.g.
target: dep1 \
  dep2

or

target: \
  dep1 \
  dep2

cmacq2/kate,sandsmark/kate,sandsmark/kate,jfmcarreira/kate,hlamer/kate,hlamer/kate,sandsmark/kate,DickJ/kate,hlamer/kate,cmacq2/kate,hlamer/kate,jfmcarreira/kate,DickJ/kate,DickJ/kate,hlamer/kate,jfmcarreira/kate,cmacq2/kate,hlamer/kate,sandsmark/kate,hlamer/kate,hlamer/kate,hlamer/kate,hlamer/kate,DickJ/kate