Exclude some packages from fedora 29 builds

Those packages don't exist in fedora 29:
pyside2-tools, python3-pyside2-devel, python3-shiboken2-devel

Signed-off-by: Przemo Firszt <przemo@firszt.eu>

package/fedora/freecad.spec

@@ -79,15 +79,19 @@ BuildRequires:  netgen-mesher-devel-private
 BuildRequires:  python3-pivy
 BuildRequires:  mesa-libEGL-devel
 BuildRequires:  pcl-devel
+%if 0%{?fedora} > 29
 BuildRequires:  pyside2-tools
+%endif
 BuildRequires:  python3
 BuildRequires:  python3-devel
 BuildRequires:  python3-matplotlib
 %if ! %{bundled_pycxx}
 BuildRequires:  python3-pycxx-devel
 %endif
+%if 0%{?fedora} > 29
 BuildRequires:  python3-pyside2-devel
 BuildRequires:  python3-shiboken2-devel
+%endif
 BuildRequires:  qt5-devel
 BuildRequires:  qt5-qtwebkit-devel
 %if ! %{bundled_smesh}