run dnf upgrade before installing in fedora

Signed-off-by: Andrew Hsu <andrewhsu@docker.com>
(cherry picked from commit ebd804bfb6af27b04514512676619b6a961551dc)
Signed-off-by: Victor Vieux <victorvieux@gmail.com>
diff --git a/contrib/builder/rpm/amd64/fedora-23/Dockerfile b/contrib/builder/rpm/amd64/fedora-23/Dockerfile
index c2e5bf0..7d9353d 100644
--- a/contrib/builder/rpm/amd64/fedora-23/Dockerfile
+++ b/contrib/builder/rpm/amd64/fedora-23/Dockerfile
@@ -4,6 +4,7 @@
 
 FROM fedora:23
 
+RUN dnf -y upgrade
 RUN dnf install -y @development-tools fedora-packager
 RUN dnf install -y btrfs-progs-devel device-mapper-devel glibc-static libseccomp-devel libselinux-devel libtool-ltdl-devel pkgconfig selinux-policy selinux-policy-devel sqlite-devel systemd-devel tar git cmake vim-common
 
diff --git a/contrib/builder/rpm/amd64/fedora-24/Dockerfile b/contrib/builder/rpm/amd64/fedora-24/Dockerfile
index 0d79914..07e3733 100644
--- a/contrib/builder/rpm/amd64/fedora-24/Dockerfile
+++ b/contrib/builder/rpm/amd64/fedora-24/Dockerfile
@@ -4,6 +4,7 @@
 
 FROM fedora:24
 
+RUN dnf -y upgrade
 RUN dnf install -y @development-tools fedora-packager
 RUN dnf install -y btrfs-progs-devel device-mapper-devel glibc-static libseccomp-devel libselinux-devel libtool-ltdl-devel pkgconfig selinux-policy selinux-policy-devel sqlite-devel systemd-devel tar git cmake vim-common
 
diff --git a/contrib/builder/rpm/amd64/fedora-25/Dockerfile b/contrib/builder/rpm/amd64/fedora-25/Dockerfile
index c80a4de..2663832 100644
--- a/contrib/builder/rpm/amd64/fedora-25/Dockerfile
+++ b/contrib/builder/rpm/amd64/fedora-25/Dockerfile
@@ -4,6 +4,7 @@
 
 FROM fedora:25
 
+RUN dnf -y upgrade
 RUN dnf install -y @development-tools fedora-packager
 RUN dnf install -y btrfs-progs-devel device-mapper-devel glibc-static libseccomp-devel libselinux-devel libtool-ltdl-devel pkgconfig selinux-policy selinux-policy-devel sqlite-devel systemd-devel tar git cmake vim-common
 
diff --git a/contrib/builder/rpm/amd64/generate.sh b/contrib/builder/rpm/amd64/generate.sh
index 895837e..58a5381 100755
--- a/contrib/builder/rpm/amd64/generate.sh
+++ b/contrib/builder/rpm/amd64/generate.sh
@@ -53,6 +53,9 @@
 			echo "RUN yum install -y kernel-uek-devel-4.1.12-32.el6uek"  >> "$version/Dockerfile"
 			echo >> "$version/Dockerfile"
 			;;
+		fedora:*)
+			echo "RUN ${installer} -y upgrade" >> "$version/Dockerfile"
+			;;
 		*) ;;
 	esac