Add ESDK_MANIFEST_EXCLUDES to enable excluding items in sdk-conf-manifest.
By default, files under conf/ are all added to sdk-conf-manifest, as the
manifest file is set to 'conf/*'.
However, there are situations where some configuration files under conf/
directory are not intended to be added to sdk-conf-manifest, thus adding
ESDK_MANIFEST_EXCLUDES to enable users to do this.
This variable takes the form of glob matching.
e.g.
ESDK_MANIFEST_EXCLUDES = "conf/autogen*"
This would exclude all files under conf/ starting with 'autogen' from
sdk-conf-manifest.
Signed-off-by: Chen Qi <Qi.Chen@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
