Log Message:
Update yelp to 2.26.0.

Changes in 2.26.0:
------------------
* Don't assume order of certain man macros, bug #568066 (Andy Owen)
* Fixed locking issue, bug #568058 (Andy Owen)
* Updated translations:
  mai     (Rajesh Ranjan)
  hi      (Rajesh Ranjan)
  as      (Amitakhya Phukan)
  ml      (Ani Peter)
  te      (Krishnababu K)
  he      (Yair Hershkovitz)

Changes in 2.25.1:
------------------
* RTL fixes, bug #573159, Shaun McCance
* Fixed libxul[-embedding] detection, Christian Persch
* Removed deprecated GTK symbols, bug #571868, Thomas H.P. Andersen
* Fixed crasher, bug #552947, Antonio Litterio
* Fixed loading of local HTML files, bug #562137, Josselin Mouette
* Updated translations:
  ar          (Khaled Hosny)
  ast         (Mikel González)
  et          (Ivar Smolin)
  it          (Milo Casagrande)
  ko          (Changwoo Ryu)
  la          (Rafael Garcia)
  ps          (Zabeeh Khan)
  sv          (Daniel Nylander)
  uz          (Nurali Abdurahmonov)
  uz@cyrillic (Nurali Abdurahmonov)
  zh_HK       (Chao-Hsiung Liao)
  zh_TW       (Chao-Hsiung Liao)