When HOME was unset, ~/.cache collapsed to /.cache on the read-only
QNX QEMU rootfs, so Fontconfig printed "No writable cache
directories" from QtGui-linking sub-tests and broke the
expected-output validation in tst_selftests.
Set HOME=/data/home/root (distinct from TMPDIR so filesystem
watcher tests keep separate watchable dirs) and point
FONTCONFIG_FILE at the deployed fonts.conf. QNX SDP 8.0 ships
fonts.conf at etc/fonts/fonts.conf, not etc/fontconfig/fonts.conf
as 7.1 did, so correct the data_files.custom source path too.
Squashes the former HOME-only and FONTCONFIG_FILE changes, which
conflicted on the same QNX_TEST_ENV lines and could not integrate
together.
Pick-to: 6.8 6.11 6.12
Change-Id: I1943d07eff0a2e99bb96db28e73b4c77e4aa2df8
Reviewed-by: Marianne Yrjänä <marianne.yrjana@qt.io>
Reviewed-by: Simo Fält <simo.falt@qt.io>
6282a3fd8a