Yocto 2.4

Move OpenBMC to Yocto 2.4(rocko)

Tested: Built and verified Witherspoon and Palmetto images
Change-Id: I12057b18610d6fb0e6903c60213690301e9b0c67
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/import-layers/yocto-poky/meta/classes/pythonnative.bbclass b/import-layers/yocto-poky/meta/classes/pythonnative.bbclass
index 4e0381b..4cc8b27 100644
--- a/import-layers/yocto-poky/meta/classes/pythonnative.bbclass
+++ b/import-layers/yocto-poky/meta/classes/pythonnative.bbclass
@@ -12,5 +12,8 @@
 export STAGING_INCDIR
 export STAGING_LIBDIR
 
+# suppress host user's site-packages dirs.
+export PYTHONNOUSERSITE = "1"
+
 # autoconf macros will use their internal default preference otherwise
 export PYTHON