7121368: Remove jdbc-odbc bridge from macosx build

Reviewed-by: phh, ohair
diff --git a/jdk/make/sun/Makefile b/jdk/make/sun/Makefile
index 5c597cb..56855cd 100644
--- a/jdk/make/sun/Makefile
+++ b/jdk/make/sun/Makefile
@@ -63,8 +63,11 @@
 endif
 
 ifndef OPENJDK
+ifneq ($(PLATFORM), macosx)
   JDBC_SUBDIR = jdbc
 endif
+endif
+
 ifdef OPENJDK
   RENDER_SUBDIR = pisces
 else