hg: jdk/sandbox: 8228902: add os::dll_load to the unified logging os category

[chris.hegarty at oracle.com]

Changeset: ddae2da329ed
Author:    mbaesken
Date:      2019-08-02 10:10 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/ddae2da329ed

8228902: add os::dll_load to the unified logging os category
Reviewed-by: coleenp, mdoerr

! src/hotspot/os/aix/os_aix.cpp
! src/hotspot/os/bsd/os_bsd.cpp
! src/hotspot/os/linux/os_linux.cpp
! src/hotspot/os/solaris/os_solaris.cpp
! src/hotspot/os/windows/os_windows.cpp