Clean up weston_config symbols from libweston
Submitted by Pekka Paalanen
Assigned to Pekka Paalanen
libweston still exports symbols related to
weston_config structure, because it links in
libshared.la which has them exported. Only Weston the executable should be exporting them.
config-parser.h gets installed into libweston directory, when it should go into weston directory.