Disable gtk-doc for RISC-V (riscv64)

Currently we fail with:

BUILDSTDERR: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe9 in position 215: invalid continuation byte

and this needs further debugging.

Signed-off-by: David Abdurachmanov <david.abdurachmanov@gmail.com>

gstreamer.spec

@@ -7,7 +7,7 @@
 
 Name:           %{gstreamer}
 Version:        0.10.36
-Release:        21%{?dist}
+Release:        21.0.riscv64%{?dist}
 Summary:        GStreamer streaming media framework runtime
 
 Group:          Applications/Multimedia
@@ -26,7 +26,9 @@ BuildRequires:  bison
 BuildRequires:  flex
 BuildRequires:  m4
 BuildRequires:  check-devel
+%ifnarch riscv64
 BuildRequires:  gtk-doc >= 1.3
+%endif
 BuildRequires:  gettext
 BuildRequires:  pkgconfig
 BuildRequires:  gobject-introspection-devel >= %{_gobject_introspection}
@@ -128,7 +130,11 @@ with different major/minor versions of GStreamer.
 %configure \
   --with-package-name='Fedora GStreamer package' \
   --with-package-origin='http://download.fedoraproject.org' \
+%ifnarch riscv64
   --enable-gtk-doc \
+%else
+  --disable-gtk-doc \
+%endif
   --enable-debug \
   --disable-tests --disable-examples
 
@@ -244,6 +250,9 @@ install -m0644 -D %{SOURCE2} $RPM_BUILD_ROOT%{_rpmconfigdir}/fileattrs/gstreamer
 %doc %{_datadir}/gtk-doc/html/gstreamer-plugins-%{majorminor}
 
 %changelog
+* Thu Aug 23 2018 David Abdurachmanov <david.abdurachmanov@gmail.com> - 0.10.36-21.0.riscv64
+- Disable gtk-doc for RISC-V (riscv64) until unicode decode errors are understood
+
 * Fri Jul 13 2018 Fedora Release Engineering <releng@fedoraproject.org> - 0.10.36-21
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild