qt5base: fix build with ALSA >= 1.1.x

This commit adds an upstream qtbase commit that fixes the detection of
ALSA versions >= 1.1.x, as we have in Buildroot.

Signed-off-by: Jiri Novotny <jiri.novotny@logicelements.cz>
[Thomas: change to use the upstream commit directly, using <pkg>_PATCH.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/qt5/qt5base/qt5base.hash

@@ -1,2 +1,3 @@
 # Hash from: http://download.qt.io/official_releases/qt/5.6/5.6.0/submodules/qtbase-opensource-src-5.6.0.tar.xz.mirrorlist
 sha256 6efa8a5c559e92b2e526d48034e858023d5fd3c39115ac1bfd3bb65834dbd67a qtbase-opensource-src-5.6.0.tar.xz
+sha256 e03740e20b8dbf52d163d8a4a37125e7c55b59a9a5e7cf7e89a08e07286b6135	b8f98d956501dfa4ce03a137f15d404930a56066.patch

package/qt5/qt5base/qt5base.mk

@@ -7,6 +7,7 @@
 QT5BASE_VERSION = $(QT5_VERSION)
 QT5BASE_SITE = $(QT5_SITE)
 QT5BASE_SOURCE = qtbase-opensource-src-$(QT5BASE_VERSION).tar.xz
+QT5BASE_PATCH = https://github.com/qtproject/qtbase/commit/b8f98d956501dfa4ce03a137f15d404930a56066.patch
 
 QT5BASE_DEPENDENCIES = host-pkgconf zlib pcre
 QT5BASE_INSTALL_STAGING = YES