Revert "build: Try again to fix srcdir != builddir build"
Revert "build: Try again to fix srcdir != builddir build"

This reverts commit 6738de398f59d8e2f074ebaa2f2d05ac953730bb.

saitoha/vte-sixel,thestinger/vte-ng,saitoha/vte-sixel,thestinger/vte-ng,saitoha/vte-sixel,thestinger/vte-ng