Override gtk-doc.bbclass to not depend on gtk-doc
Override gtk-doc.bbclass to not depend on gtk-doc

Override gtk-doc.bbclass so that recipes Debian will
not depend on gtk-doc anymore.

Signed-off-by: CongNT <55af0651c88f14d10095de5333356c44a1889d24@toshiba-tsdv.com>

rofehr/meta-debian,nghiaht-tsdv/meta-debian,congnt-tsdv/meta-debian,nghiaht-tsdv/meta-debian,rofehr/meta-debian,congnt-tsdv/meta-debian,nghiaht-tsdv/meta-debian,meta-debian/meta-debian,congnt-tsdv/meta-debian,tienlee/meta-debian,wwright2/meta-debian,tienlee/meta-debian,meta-debian/meta-debian,tienlee/meta-debian,congnt-tsdv/meta-debian,tienlee/meta-debian,rofehr/meta-debian,meta-debian/meta-debian,congnt-tsdv/meta-debian,rofehr/meta-debian,nghiaht-tsdv/meta-debian,wwright2/meta-debian,rofehr/meta-debian,rofehr/meta-debian,tienlee/meta-debian,nghiaht-tsdv/meta-debian,meta-debian/meta-debian,wwright2/meta-debian,meta-debian/meta-debian,tienlee/meta-debian,nghiaht-tsdv/meta-debian,wwright2/meta-debian,congnt-tsdv/meta-debian,wwright2/meta-debian,meta-debian/meta-debian