ENABLE_CRASHDUMP is always empty.
dbghelp.dll was removed from scp2 in
8ab4d2f2

Change-Id: I5c47ce4b4cafb2f24185ddd9a31eb1a3176fa176
Reviewed-on: https://gerrit.libreoffice.org/32395Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Matúš Kukan <matus@libreoffice.org>