nativesdk-qt4-tools: create qt.conf file

When installing the SDK to another location than the default one, qmake
will look for libraries, headers, etc. in the default location. That's
because the paths are hard-coded in the binary itself. Luckily, QT
allows to override this using a qt.conf file installed in the same
directory with the application executable. However, we already have a
patch that allows for the installation of qt.conf in another place and
read the location from QT_CONF_PATH environment variable.

Hence, install qt.conf in ${sysconfdir}. This will allow other apps, that
use QLibraryInfo class, to find it.

[YOCTO #5339]

(From OE-Core master rev: 23f88695683a8e428375a8ccb6be935347a8768c)

(From OE-Core rev: 0e71811a1c3285a71cbca682cb62c1563d3e74ee)

Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-qt/qt4/nativesdk-qt4-tools.inc

@@ -118,4 +118,10 @@ do_install() {
     for i in moc uic uic3 rcc lrelease lupdate qdbuscpp2xml qdbusxml2cpp; do \
         ln -s ${i}4 ${i}; \
     done)
+
+    install -d ${D}${sysconfdir}
+    cat >${D}${sysconfdir}/qt.conf <<EOF
+[Paths]
+Prefix = ${prefix}
+EOF
 }