Add back in ppc64le and ppc64 builds

Seems to be building again fine now.

rpm-ostree.spec

@@ -1,7 +1,7 @@
 Summary: Hybrid image/package system
 Name: rpm-ostree
 Version: 2019.4
-Release: 2%{?dist}
+Release: 3%{?dist}
 #VCS: https://github.com/cgwalters/rpm-ostree
 # This tarball is generated via "cd packaging && make -f Makefile.dist-packaging dist-snapshot"
 # in the upstream git.  If rust is enabled, it contains vendored sources.
@@ -13,10 +13,6 @@ Patch0: 0001-app-db-diff-Add-format-json-output.patch
 
 ExclusiveArch: %{rust_arches}
 
-# Temporarily disable ppc64le builds for now:
-# https://bugzilla.redhat.com/show_bug.cgi?id=1713090
-ExcludeArch: ppc64 ppc64le
-
 %if 0%{?fedora}
 BuildRequires: cargo
 BuildRequires: rust
@@ -182,6 +178,9 @@ $PYTHON autofiles.py > files.devel \
 %files devel -f files.devel
 
 %changelog
+* Tue May 28 2019 Dusty Mabe <dusty@dustymabe.com> - 2019.4-3
+- Add back in ppc64le and ppc64
+
 * Thu May 23 2019 Dusty Mabe <dusty@dustymabe.com> - 2019.4-2
 - Backport patch for db diff --format=json