reset upstream subtrees to yocto 2.6

Reset the following subtrees on thud HEAD:

  poky: 87e3a9739d
  meta-openembedded: 6094ae18c8
  meta-security: 31dc4e7532
  meta-raspberrypi: a48743dc36
  meta-xilinx: c42016e2e6

Also re-apply backports that didn't make it into thud:
  poky:
    17726d0 systemd-systemctl-native: handle Install wildcards

  meta-openembedded:
    4321a5d libtinyxml2: update to 7.0.1
    042f0a3 libcereal: Add native and nativesdk classes
    e23284f libcereal: Allow empty package
    030e8d4 rsyslog: curl-less build with fmhttp PACKAGECONFIG
    179a1b9 gtest: update to 1.8.1

Squashed OpenBMC subtree compatibility updates:
  meta-aspeed:
    Brad Bishop (1):
          aspeed: add yocto 2.6 compatibility

  meta-ibm:
    Brad Bishop (1):
          ibm: prepare for yocto 2.6

  meta-ingrasys:
    Brad Bishop (1):
          ingrasys: set layer compatibility to yocto 2.6

  meta-openpower:
    Brad Bishop (1):
          openpower: set layer compatibility to yocto 2.6

  meta-phosphor:
    Brad Bishop (3):
          phosphor: set layer compatibility to thud
          phosphor: libgpg-error: drop patches
          phosphor: react to fitimage artifact rename

    Ed Tanous (4):
          Dropbear: upgrade options for latest upgrade
          yocto2.6: update openssl options
          busybox: remove upstream watchdog patch
          systemd: Rebase CONFIG_CGROUP_BPF patch

Change-Id: I7b1fe71cca880d0372a82d94b5fd785323e3a9e7
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/poky/meta/recipes-extended/xinetd/xinetd_2.3.15.bb b/poky/meta/recipes-extended/xinetd/xinetd_2.3.15.bb
index 1beb545..6e43f5b 100644
--- a/poky/meta/recipes-extended/xinetd/xinetd_2.3.15.bb
+++ b/poky/meta/recipes-extended/xinetd/xinetd_2.3.15.bb
@@ -6,8 +6,7 @@
 LICENSE = "BSD"
 LIC_FILES_CHKSUM = "file://COPYRIGHT;md5=8ad8615198542444f84d28a6cf226dd8"
 
-DEPENDS = ""
-DEPENDS_append_libc-musl = " libtirpc "
+DEPENDS += "libtirpc"
 PR = "r2"
 
 # Blacklist a bogus tag in upstream check
@@ -42,8 +41,8 @@
 PACKAGECONFIG ??= "tcp-wrappers"
 PACKAGECONFIG[tcp-wrappers] = "--with-libwrap,,tcp-wrappers"
 
-CFLAGS_append_libc-musl = " -I${STAGING_INCDIR}/tirpc "
-LDFLAGS_append_libc-musl = " -ltirpc "
+CFLAGS += "-I${STAGING_INCDIR}/tirpc"
+LDFLAGS += "-ltirpc"
 
 do_configure() {
 	# Looks like configure.in is broken, so we are skipping