perl: Add missing procps-ps dependency for ptests

Some of the ptests fail in a minimal image as they depend on options
to ps which busybox doesn't support. Add the full utility.

(From OE-Core rev: 7305b96dd5b41050c867ce620109407e8fd8b53a)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/perl/perl-ptest.inc

@@ -56,7 +56,7 @@ python populate_packages:prepend() {
             '${PN}-ptest%s', '%s', recursive=True, match_path=True)
 }
 
-RDEPENDS:${PN}-ptest += "${PN}-modules ${PN}-doc sed"
+RDEPENDS:${PN}-ptest += "${PN}-modules ${PN}-doc sed procps-ps"
 
 # The perl-ptest package contains Perl internal modules and generating file
 # dependencies for it causes problems.