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/meta-openembedded/meta-webserver/recipes-httpd/nginx/nginx_1.15.1.bb b/meta-openembedded/meta-webserver/recipes-httpd/nginx/nginx_1.15.1.bb
new file mode 100644
index 0000000..0f1ba8f
--- /dev/null
+++ b/meta-openembedded/meta-webserver/recipes-httpd/nginx/nginx_1.15.1.bb
@@ -0,0 +1,10 @@
+require nginx.inc
+
+# 1.14.x branch is the current stable branch, the recommended default
+# 1.15.x is the current mainline branches containing all new features
+DEFAULT_PREFERENCE = "-1"
+
+LIC_FILES_CHKSUM = "file://LICENSE;md5=3691402cc54ce09f800ca348634a2dfe"
+
+SRC_URI[md5sum] = "2dd5a265c54a76b699443931d80a61b9"
+SRC_URI[sha256sum] = "c7206858d7f832b8ef73a45c9b8f8e436bcb1ee88db2bc85b8e438ecec9d5460"