Fix missing CERES_METIS_VERSION

CERES_METIS_VERSION needs to be set if either Eigen or
SuiteSparse are using it. Previously, we were conditioning it
only on EIGENMETIS being ON.

Change-Id: I380a3b138b79903aa142b560ed46f438ff549a82

internal/ceres/CMakeLists.txt

diff --git a/internal/ceres/CMakeLists.txt b/internal/ceres/CMakeLists.txt
index 417652b..dd93509 100644
--- a/internal/ceres/CMakeLists.txt
+++ b/internal/ceres/CMakeLists.txt
@@ -130,11 +130,11 @@
   endif (SuiteSparse_Partition_FOUND)
 endif (SUITESPARSE AND SuiteSparse_FOUND)
 
-if (EIGENMETIS AND METIS_FOUND)
+if (SuiteSparse_Partition_FOUND OR EIGENMETIS)
   # Define version information for use in Solver::FullReport.
   add_definitions(-DCERES_METIS_VERSION="${METIS_VERSION}")
   list(APPEND CERES_LIBRARY_PRIVATE_DEPENDENCIES METIS::METIS)
-endif (EIGENMETIS AND METIS_FOUND)
+endif (SuiteSparse_Partition_FOUND OR EIGENMETIS)
 
 if (ACCELERATESPARSE AND AccelerateSparse_FOUND)
   list(APPEND CERES_LIBRARY_PRIVATE_DEPENDENCIES ${AccelerateSparse_LIBRARIES})