Move bmcweb bbappend files to interfaces

- meta-phosphor has bmcweb bitbake file under interfaces,so
  moving the append files accordingly.

Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
Change-Id: Ied29dd33121dc4d9e38236be848cbcdcb44e9458
diff --git a/recipes-phosphor/bmcweb/bmcweb_%.bbappend b/recipes-phosphor/interfaces/bmcweb_%.bbappend
similarity index 100%
rename from recipes-phosphor/bmcweb/bmcweb_%.bbappend
rename to recipes-phosphor/interfaces/bmcweb_%.bbappend