Jenkins_Callgrind broken after: Drop extra define ENABLE_GTKSINK

[Luke Benes]

Michael,

https://cgit.freedesktop.org/libreoffice/core/commit/?id=34bbf192a7753205bb64d14e4eec4ce303317396

broke Jenkins_Callgrind 
https://tinderbox.libreoffice.org/cgi-bin/gunzip.cgi?tree=MASTER&brief-log=1559555453.4509

https://ci.libreoffice.org/computer/vm139/builds

with this error:
avmedia/source/gstreamer/gstplayer.hxx:33:14: fatal error: gtk/gtk.h: No such file or directory


Does Jenkins_Callgrind need to be upgraded?

-Luke