MacOS is not MacOS X anymore

* subversion/bindings/javahl/README
  s/MacOS X/MacOS/


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1914896 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/subversion/bindings/javahl/README b/subversion/bindings/javahl/README
index f69899f..134dd9b 100644
--- a/subversion/bindings/javahl/README
+++ b/subversion/bindings/javahl/README
@@ -39,7 +39,7 @@
 has been tested.  JUnit can be downloaded from https://junit.org/ .)
 
 
-MacOS X:
+MacOS:
 
 After building libsvnjavahl.dylib, you must rename it to
 libsvnjavahl.jnilib. Make install-javahl creates a symbolic