Minor adjustment in header inclusions to work around osx clang 9.0.1 pragma once issue

Wentzell · Wentzell · commit 8572d7bed1ce · 2020-09-01T14:53:41.000-04:00
diff --git a/c++/mpi/string.hpp b/c++/mpi/string.hpp
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 #pragma once
-#include "./mpi.hpp"
+#include "mpi.hpp"
 #include <string>
 
 namespace mpi {
diff --git a/c++/mpi/vector.hpp b/c++/mpi/vector.hpp
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 #pragma once
-#include "./mpi.hpp"
+#include "mpi.hpp"
 #include <vector>
 
 namespace mpi {
