build: Drop a circular dependency on sw-enum-types.h
build: Drop a circular dependency on sw-enum-types.h

The list of headers used to generate the enumeration types should not
contain the generated enum-types.h header file as well.

Signed-off-by: Emmanuele Bassi <049ee2061f71220e5aaf33f5be422fc2a2b06a44@linux.intel.com>

ThomasBollmeier/libsocialweb-flickr-oauth,ThomasBollmeier/libsocialweb-flickr-oauth,ThomasBollmeier/libsocialweb-flickr-oauth,GNOME/libsocialweb,GNOME/libsocialweb,lcp/libsocialweb,GNOME/libsocialweb,lcp/libsocialweb,lcp/libsocialweb