Fix issue preventing debug mode from working.

Some constants were declared but not defined. This worked in opt mode as they were inlined, but not debug mode.

PiperOrigin-RevId: 355967655
Change-Id: I9d0a4b7a91f98fa35b73f218c31177b90044e37b

tensorflow/core/common_runtime/bfc_allocator.cc

@@ -35,6 +35,7 @@ limitations under the License.
 namespace tensorflow {
 
 constexpr BFCAllocator::ChunkHandle BFCAllocator::kInvalidChunkHandle;
+constexpr uint64 BFCAllocator::kMemDebugHistorySize;
 
 BFCAllocator::BFCAllocator(SubAllocator* sub_allocator, size_t total_memory,
                            bool allow_growth, const string& name,

tensorflow/core/framework/model.cc

@@ -25,6 +25,10 @@ limitations under the License.
 namespace tensorflow {
 namespace data {
 namespace model {
+
+constexpr int64 Model::kOptimizationPeriodMinMs;
+constexpr int64 Model::kOptimizationPeriodMaxMs;
+
 namespace {
 
 // Helper function for node traversal that doesn't skip any nodes.