Unpack into temporary directory with longer name.

JIRA VPP-498

This commit is a fix so downstream builds in Centos and
RHEL mock environment will work.  This is a workaround
for a bug in the debugedit code in rpm-build package 4.13
and earlier.

Change-Id: Ia6361f7487c5afe9948a2d2fe929942ba5b9c0f1
Signed-off-by: Thomas F Herbert <therbert@redhat.com>
diff --git a/extras/rpm/vpp.spec b/extras/rpm/vpp.spec
index a319ba7..501297b 100644
--- a/extras/rpm/vpp.spec
+++ b/extras/rpm/vpp.spec
@@ -3,7 +3,8 @@
 %define _unitdir         /lib/systemd/system
 %define _topdir          %(pwd)
 %define _builddir        %{_topdir}
-%define _mu_build_dir    %{_topdir}/%{name}-%{_version}/build-root
+%define _tmp_build_dir   %{name}-%{_version}.0
+%define _mu_build_dir    %{_topdir}/%{_tmp_build_dir}/build-root
 %define _vpp_tag	 %{getenv:TAG}
 %if "%{_vpp_tag}" == ""
 %define _vpp_tag	 vpp
@@ -119,13 +120,20 @@
 This package contains the python bindings for the vpp api
 
 %prep
-%setup -q -n %{name}-%{_version}
+# Unpack into dir with longer name as work around of debugedit bug in in rpm-build 4.13
+rm -rf %{name}-%{_version}
+rm -rf %{_tmpbuild_dir}
+/usr/bin/xz -dc '%{_sourcedir}/%{name}-%{_version}-%{_release}.tar.xz' | /usr/bin/tar -xf -
+mv %{name}-%{_version} %{_tmp_build_dir}
+cd '%{_tmp_build_dir}'
+/usr/bin/chmod -Rf a+rX,u+w,g-w,o-w .
 
 %pre
 # Add the vpp group
 groupadd -f -r vpp
 
 %build
+cd '%{_tmp_build_dir}'
 %if %{with aesni}
     make bootstrap
     make -C build-root PLATFORM=vpp TAG=%{_vpp_tag} install-packages