Exclude libvndksupport from APEXes.

Test: build, boot, and checked mount paths.
Bug: 123948402
Change-Id: I687dde4f3d1a7971f68c7c536de5002dcdaecfa4
diff --git a/rootdir/etc/ld.config.legacy.txt b/rootdir/etc/ld.config.legacy.txt
index 48ca998..e897d81 100644
--- a/rootdir/etc/ld.config.legacy.txt
+++ b/rootdir/etc/ld.config.legacy.txt
@@ -126,6 +126,7 @@
 namespace.resolv.link.default.shared_libs += libm.so
 namespace.resolv.link.default.shared_libs += libdl.so
 namespace.resolv.link.default.shared_libs += libbinder_ndk.so
+namespace.resolv.link.default.shared_libs += libvndksupport.so
 
 ###############################################################################
 # Namespace config for binaries under /postinstall.