Add virtual provider for /usr/bin/ksh

`/usr/bin/ksh` path is now set up by alternatives, so add a virtual
provider for it.

ksh.spec

@@ -3,7 +3,7 @@ Summary:      The Original ATT Korn Shell
 URL:          http://www.kornshell.com/
 License:      EPL
 Version:      2020.0.0
-Release:      0.1%{?dist}
+Release:      0.2%{?dist}
 # We are upgrading from ksh-20120801-250, so set epoch.
 Epoch:        1
 Source0:      https://github.com/att/ast/releases/download/%{version}-alpha1/%{name}-%{version}-alpha1.tar.gz
@@ -25,6 +25,7 @@ Requires(post): grep, coreutils, systemd-units
 Requires(postun): sed
 
 Provides:       /bin/ksh
+Provides:       /usr/bin/ksh
 
 %description
 KornShell is a shell programming language, which is upward compatible
@@ -115,7 +116,10 @@ fi
 %config(noreplace) %{_sysconfdir}/binfmt.d/kshcomp.conf
 
 %changelog
-* Wed Apr 17 2019 Siteshwar Vashisht <svashisht@redhat.com> - 2020.0.0-0.1
+* Wed Apr 24 2019 Siteshwar Vashisht <svashisht@redhat.com> - 1:2020.0.0-0.2
+- Add virtual provider for `/usr/bin/ksh`
+
+* Wed Apr 17 2019 Siteshwar Vashisht <svashisht@redhat.com> - 1:2020.0.0-0.1
 - Rebase to 2020.0.0-alpha1
   Resolves: #1700777