Work around Travis failures.
Work around Travis failures.

Note that we should revert this when the issue is fixed.

seanwu99/bootstrap,GerHobbelt/bootstrap,nice-fungal/bootstrap,bootstrapbrasil/bootstrap,seanwu99/bootstrap,joblocal/bootstrap,coliff/bootstrap,nice-fungal/bootstrap,Lyricalz/bootstrap,twbs/bootstrap,stanwmusic/bootstrap,twbs/bootstrap,yuyokk/bootstrap,tagliala/bootstrap,SweetProcess/bootstrap,janseliger/bootstrap,tagliala/bootstrap,inway/bootstrap,gijsbotje/bootstrap,GerHobbelt/bootstrap,yuyokk/bootstrap,stanwmusic/bootstrap,bootstrapbrasil/bootstrap,9-chirno/chirno,GerHobbelt/bootstrap,Lyricalz/bootstrap,zalog/bootstrap,Hemphill/bootstrap-docs,gijsbotje/bootstrap,zalog/bootstrap,zalog/bootstrap,fschumann1211/bootstrap,supergibbs/bootstrap,peterblazejewicz/bootstrap,Hemphill/bootstrap-docs,inway/bootstrap,stanwmusic/bootstrap,9-chirno/chirno,peterblazejewicz/bootstrap,bardiharborow/bootstrap,janseliger/bootstrap,gijsbotje/bootstrap,SweetProcess/bootstrap,m5o/bootstrap,kvlsrg/bootstrap,vsn4ik/bootstrap,tjkohli/bootstrap,Lyricalz/bootstrap,9-chirno/chirno,fschumann1211/bootstrap,9-chirno/chirno,vsn4ik/bootstrap,inway/bootstrap,janseliger/bootstrap,nice-fungal/bootstrap,fschumann1211/bootstrap,creativewebjp/bootstrap,creativewebjp/bootstrap,seanwu99/bootstrap,Hemphill/bootstrap-docs,supergibbs/bootstrap,supergibbs/bootstrap,yuyokk/bootstrap,joblocal/bootstrap,tjkohli/bootstrap,SweetProcess/bootstrap,Hemphill/bootstrap-docs,fschumann1211/bootstrap,coliff/bootstrap,bootstrapbrasil/bootstrap,yuyokk/bootstrap,vsn4ik/bootstrap,m5o/bootstrap,seanwu99/bootstrap,bardiharborow/bootstrap,vsn4ik/bootstrap,stanwmusic/bootstrap,gijsbotje/bootstrap,bardiharborow/bootstrap,kvlsrg/bootstrap,creativewebjp/bootstrap,SweetProcess/bootstrap,bardiharborow/bootstrap,tagliala/bootstrap,supergibbs/bootstrap,janseliger/bootstrap,Lyricalz/bootstrap,kvlsrg/bootstrap,joblocal/bootstrap,creativewebjp/bootstrap,peterblazejewicz/bootstrap,joblocal/bootstrap