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-devtools/pkgconf/pkgconf_1.4.2.bb b/poky/meta/recipes-devtools/pkgconf/pkgconf_1.5.3.bb
similarity index 92%
rename from poky/meta/recipes-devtools/pkgconf/pkgconf_1.4.2.bb
rename to poky/meta/recipes-devtools/pkgconf/pkgconf_1.5.3.bb
index ea7b666..415478d 100644
--- a/poky/meta/recipes-devtools/pkgconf/pkgconf_1.4.2.bb
+++ b/poky/meta/recipes-devtools/pkgconf/pkgconf_1.5.3.bb
@@ -21,10 +21,10 @@
     file://pkg-config-native.in \
     file://pkg-config-esdk.in \
 "
-SRC_URI[md5sum] = "678d242b4eef1754bba6a58642af10bb"
-SRC_URI[sha256sum] = "bab39371d4ab972be1d539a8b10b6cc21f8eafc97f617102e667e82bd32eb234"
+SRC_URI[md5sum] = "c21743bca14c882c0f282746168a5edc"
+SRC_URI[sha256sum] = "d3468308553c94389dadfd10c4d1067269052b5364276a9d24a643c88485f715"
 
-inherit autotools update-alternatives
+inherit autotools
 
 EXTRA_OECONF += "--with-pkg-config-dir='${libdir}/pkgconfig:${datadir}/pkgconfig'"
 
@@ -46,8 +46,6 @@
     install -m755 ${B}/pkg-config-esdk ${D}${bindir}/pkg-config-esdk
 }
 
-ALTERNATIVE_${PN} = "pkg-config"
-
 # When using the RPM generated automatic package dependencies, some packages
 # will end up requiring 'pkgconfig(pkg-config)'.  Allow this behavior by
 # specifying an appropriate provide.