contrib: add missing common OE variables

Signed-off-by: Jose Alarcon <jose.alarcon@ge.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

contrib/oe-stylize.py

@@ -121,6 +121,7 @@ OE_vars = [
     'CONFFILES',
     'CONFLICTS',
     'CORE_EXTRA_D',
+    'CORE_IMAGE_EXTRA_INSTALL',
     'CORE_PACKAGES_D',
     'CORE_PACKAGES_RD',
     'CPPFLAGS',
@@ -141,6 +142,7 @@ OE_vars = [
     'INITSCRIPT_PACKAGES',
     'INITSCRIPT_NAME',
     'INITSCRIPT_PARAMS',
+    'INSANE_SKIP',
     'PACKAGE_INSTALL',
     'KERNEL_IMAGETYPE',
     'KERNEL_IMAGEDEST',
@@ -199,6 +201,8 @@ OE_vars = [
     'UBOOT_MACHINE',
     'UCLIBC_BASE',
     'UCLIBC_PATCHES',
+    'USERADD_PACKAGES',
+    'USERADD_PARAM',
     'VIRTUAL_NAME',
     'XORG_PN',
     'XSERVER',