nativesdk-qtbase.inc: avoid removing directories, namely /usr/lib itself

Signed-off-by: Denys Dmytriyenko <denys@ti.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

recipes-qt/qt5/nativesdk-qtbase.inc

@@ -230,7 +230,7 @@ do_install() {
            ${D}/${OE_QMAKE_PATH_PLUGINS} \
            ${D}${libdir}/cmake \
            ${D}${libdir}/pkgconfig
-    find ${D}${libdir} -maxdepth 1 -name 'lib*' -and \
+    find ${D}${libdir} -maxdepth 1 -name 'lib*' -and -not -type d -and \
                                    -not -name 'libQt5Core.so*' -and \
                                    ${QTLIBSPRESERVE} \
                                    -not -name 'libQt5Bootstrap.a' \