[Buildroot] [PATCH] package/qt5: bump latest version to 5.9.1

[Joshua Henderson]

Arnout,

>>> +ifeq ($(BR2_PACKAGE_QT5_VERSION_5_6),y)
>>> +#  * -system-pcre because pcre is mandatory to build Qt, and we
>>> +#    want to use the one packaged in Buildroot
>>> +#    with Qt5.9 pcre should be > 10.20 (pcre2)
>>> +QT5BASE_CONFIGURE_OPTS += -system-pcre
>>
>>  So this option no longer exists in 5.9.1? Then it should be removed from line
>> 26, as well as the comment there.
>>
> 
> I will double check with 5.9.1, but this was originally found to be removed in
> some version of QT between 5.8.0 and 5.9.1.
> 

Upon further inspection, my statement above is wrong.  The global configure opts are
already:

    QT5BASE_CONFIGURE_OPTS += \
            -optimized-qmake \
            -no-cups \
            -no-iconv \
            -system-zlib \
            -system-pcre \
            -no-pch \
            -shared

Meaning, there is no need to conditionally set -system-pcre later for any version. That
addition to set it for 5.6 will be removed.

Josh