packpack: fix offending openpgm-5.2.pc include line for CMake

With the offending path, CMake complains about it with:

"
    CMake Error in examples/CMakeLists.txt:
      Imported target "PkgConfig::PC_libzmq" includes non-existent path

        "/usr/lib64/pgm-5.2/include"

      in its INTERFACE_INCLUDE_DIRECTORIES.  Possible reasons include:

      * The path was deleted, renamed, or moved to another location.

      * An install or uninstall procedure did not complete successfully.

      * The installation package was faulty and references files it does not
      provide.
"

packpack

@@ -152,7 +152,8 @@ chmod a+x ${BUILDDIR}/userwrapper.sh
     echo "if [ \"\$?\" -ne 0 ]; then"
     echo "    sudo yum install -y epel-release && \\";
     echo "       sudo yum-config-manager --add-repo http://download.opensuse.org/repositories/network:/messaging:/zeromq:/release-draft/CentOS_7/network:messaging:zeromq:release-draft.repo && \\";
-    echo "       sudo yum install -y pkgconfig uuid-devel libsodium-devel zeromq-devel czmq-devel";
+    echo "       sudo yum install -y pkgconfig uuid-devel libsodium-devel zeromq-devel czmq-devel && \\";
+    echo "       sudo sed -i -e '/Cflags:/ s/-I\${libdir}\/pgm-5.2\/include//' /usr/lib64/pkgconfig/openpgm-5.2.pc";
     echo "fi";
     echo "if [ \"\$?\" -ne 0 ]; then";
     echo "    exit 1";