systemd: Create packageconfig for ldconfig support

Useful when we disable ldconfig in glibc, we need to be able to
turn it off in systemd too, otherwise systemd tries to launch
the service and it fails

Change-Id: I170307f809a13def0cafc282e88d4eafa0313c31
(From OE-Core rev: 9c2eb7f4774356fabf21ff5147a7d34601fb57c8)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/systemd/systemd_219.bb

@@ -58,7 +58,7 @@ LDFLAGS_append_libc-uclibc = " -lrt"
 
 GTKDOC_DOCDIR = "${S}/docs/"
 
-PACKAGECONFIG ??= "xz \
+PACKAGECONFIG ??= "xz ldconfig \
                    ${@bb.utils.contains('DISTRO_FEATURES', 'pam', 'pam', '', d)} \
                    ${@bb.utils.contains('DISTRO_FEATURES', 'x11', 'xkbcommon', '', d)}"
 
@@ -83,6 +83,7 @@ PACKAGECONFIG[pam] = "--enable-pam,--disable-pam,libpam"
 PACKAGECONFIG[xkbcommon] = "--enable-xkbcommon,--disable-xkbcommon,libxkbcommon"
 # Update NAT firewall rules
 PACKAGECONFIG[iptc] = "--enable-libiptc,--disable-libiptc,iptables"
+PACKAGECONFIG[ldconfig] = "--enable-ldconfig,--disable-ldconfig,,"
 
 CACHED_CONFIGUREVARS = "ac_cv_path_KILL=${base_bindir}/kill"