office/aiksaurus: Use the C++14 standard.

gcc >= 11.x defaults to -std=gnu++17 and it breaks the build
in this case.

Signed-off-by: Andrew Clemons <andrew.clemons@gmail.com>

office/aiksaurus/aiksaurus.SlackBuild

@@ -80,7 +80,7 @@ find -L . \
 patch -p1 < $CWD/include-fixes.patch
 
 CFLAGS="$SLKCFLAGS" \
-CXXFLAGS="$SLKCFLAGS" \
+CXXFLAGS="$SLKCFLAGS -std=c++14" \
 ./configure \
   --prefix=/usr \
   --libdir=/usr/lib${LIBDIRSUFFIX} \