qt5base: Fix INCLUDE_PATH when no JPEG/PNG support
Fixes:
http://autobuild.buildroot.net/results/
4be77432390c4cfb557c3f2cc52cf732de037949/
http://autobuild.buildroot.net/results/
255a77e01d8af4090e03acb82f9ad93b7c4dd212/
http://autobuild.buildroot.net/results/
7844e6a3eeecf67dc29277b73bfe714e4d8f0d85/
http://autobuild.buildroot.net/results/
b941f35b6c8e1cf3b2c4b046dfcce98700d8f408/
http://autobuild.buildroot.net/results/
c64b640a39285f59cde47cb8d06ab70a5ac97c8b/
http://autobuild.buildroot.net/results/
f6d24b50f58251c8051d39bc1d09b5b43f81f441/
http://autobuild.buildroot.net/results/
30acea45fb497942129ca57c143bab6174e14609/
http://autobuild.buildroot.net/results/
f0891474fe2cd3e47b1489f147e31f698dbd013f/
Upstream-Status: https://codereview.qt-project.org/#/c/122145/
Signed-off-by: Julien Corjon <corjon.j@ecagroup.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>