manifest: Add meta-gplv2

Add the meta-gplv2 layer to the manifest and download it by default.
Without the addition to the bblayers.conf it will not be used.

Change-Id: I65fec794edf0f8aeb3e2cea172a9b1eaf0421f61

default.xml

@@ -15,6 +15,7 @@
     <remote name="fslc"         alias="origin"  fetch="https://github.com/Freescale"    />
 
     <project name="poky"                            revision="52b59e884110b2d48ad83438eef1fed7a28f01cf"  remote="yocto"        path="sources/poky"                      />
+    <project name="meta-gplv2"                      revision="60b251c25ba87e946a0ca4cdc8d17b1cb09292ac"  remote="yocto"        path="sources/meta-gplv2"                />
     <project name="meta-openembedded"               revision="0722ff6f021df91542b5efa1ff5b5f6269f66add"  remote="oe"           path="sources/meta-openembedded"         />
     <project name="meta-python2"                    revision="b901080cf57d9a7f5476ab4d96e56c30db8170a8"  remote="oe"           path="sources/meta-python2"              />
     <project name="meta-qt5.git"                    revision="10f3673fd4b6c6e1e61c23478802f83652475a5f"  remote="qt5-github"   path="sources/meta-qt5"                  />