tests/docker/dockerfiles: Bump fedora-i386-cross to fedora 34

For unknown and unrepeatable reasons, the cross-i386-tci test has
started failing.  "Fix" this by updating the container to use fedora 34.

Add sysprof-capture-devel as a new dependency of glib2-devel that
was not correctly spelled out in the rpm rules.

Use dnf update Just In Case -- there are presently out-of-date
packages in the upstream docker registry.

Reviewed-by: Paolo Bonzini <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Richard Henderson <[email protected]>

Author: rth7680

tests/docker/dockerfiles/fedora-i386-cross.docker

@@ -1,4 +1,5 @@
-FROM registry.fedoraproject.org/fedora:33
+FROM registry.fedoraproject.org/fedora:34
+
 ENV PACKAGES \
     bzip2 \
     ccache \
@@ -19,10 +20,11 @@ ENV PACKAGES \
     nettle-devel.i686 \
     perl-Test-Harness \
     pixman-devel.i686 \
+    sysprof-capture-devel.i686 \
     zlib-devel.i686
 
 ENV QEMU_CONFIGURE_OPTS --extra-cflags=-m32 --disable-vhost-user
 ENV PKG_CONFIG_PATH /usr/lib/pkgconfig
 
-RUN dnf install -y $PACKAGES
+RUN dnf update -y && dnf install -y $PACKAGES
 RUN rpm -q $PACKAGES | sort > /packages.txt