Add patch to fix unit tests on big endian systems.

Field3D-unit_test.patch

@@ -0,0 +1,34 @@
+From fc8ec604f5cc4cafca063029adb2cdfee3107360 Mon Sep 17 00:00:00 2001
+From: Rafael Fonseca <rdossant@redhat.com>
+Date: Thu, 13 Oct 2016 15:36:20 +0200
+Subject: [PATCH] Fallback to HDF5 in case of big endian architectures.
+
+Fixes https://github.com/imageworks/Field3D/issues/90
+---
+ src/Field3DFile.cpp | 13 +++++++++++++
+ 1 file changed, 13 insertions(+)
+
+diff --git a/src/Field3DFile.cpp b/src/Field3DFile.cpp
+index d34d364..e6caced 100644
+--- a/src/Field3DFile.cpp
++++ b/src/Field3DFile.cpp
+@@ -826,6 +826,19 @@ bool Field3DInputFile::open(const string &filename)
+                "In file: " + filename + " - Bad file hierarchy. ");
+     success = false;    
+   }
++  catch (runtime_error &e) {
++    // HDF5 fallback
++    m_hdf5.reset(new Field3DInputFileHDF5);
++    m_hdf5Base = m_hdf5;
++    if (m_hdf5->open(filename)) {
++      // Handled. Just return.
++      return true;
++    } else {
++      Msg::print(Msg::SevWarning,
++                 "In file: " + filename + ": " + string(e.what()));
++      success = false;
++    }
++  }
+   catch (...) {
+     Msg::print(Msg::SevWarning, 
+                "In file: " + filename + " Unknown exception ");

Field3D.spec

@@ -1,6 +1,6 @@
 Name:           Field3D
 Version:        1.7.2
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        Library for storing voxel data
 
 License:        BSD
@@ -80,6 +80,9 @@ popd
 
 
 %changelog
+* Mon Oct 17 2016 Richard Shaw <hobbes1069@gmail.com> - 1.7.2-3
+- Add patch to fix unit tests on big endian systems.
+
 * Wed Jun 29 2016 Orion Poplawski <orion@cora.nwra.com> - 1.7.2-2
 - Rebuild for hdf5 1.8.17