BLD: blacklist powl (longdouble power function) on OS X.  Closes gh-8307.
BLD: blacklist powl (longdouble power function) on OS X.  Closes gh-8307.

pizzathief/numpy,pizzathief/numpy,chatcannon/numpy,Eric89GXL/numpy,grlee77/numpy,gfyoung/numpy,pbrod/numpy,MSeifert04/numpy,mattip/numpy,solarjoe/numpy,MSeifert04/numpy,seberg/numpy,pizzathief/numpy,endolith/numpy,grlee77/numpy,charris/numpy,anntzer/numpy,ahaldane/numpy,b-carter/numpy,numpy/numpy,WarrenWeckesser/numpy,jakirkham/numpy,behzadnouri/numpy,shoyer/numpy,utke1/numpy,charris/numpy,endolith/numpy,madphysicist/numpy,rgommers/numpy,simongibbons/numpy,WarrenWeckesser/numpy,b-carter/numpy,pbrod/numpy,mattip/numpy,seberg/numpy,ahaldane/numpy,mhvk/numpy,b-carter/numpy,jorisvandenbossche/numpy,ssanderson/numpy,endolith/numpy,simongibbons/numpy,bertrand-l/numpy,pizzathief/numpy,MSeifert04/numpy,seberg/numpy,pdebuyl/numpy,Eric89GXL/numpy,gfyoung/numpy,jorisvandenbossche/numpy,bringingheavendown/numpy,simongibbons/numpy,rgommers/numpy,jorisvandenbossche/numpy,bertrand-l/numpy,numpy/numpy,abalkin/numpy,madphysicist/numpy,bringingheavendown/numpy,Eric89GXL/numpy,ContinuumIO/numpy,shoyer/numpy,ssanderson/numpy,pbrod/numpy,charris/numpy,rgommers/numpy,pdebuyl/numpy,chatcannon/numpy,WarrenWeckesser/numpy,numpy/numpy,grlee77/numpy,tynn/numpy,simongibbons/numpy,anntzer/numpy,solarjoe/numpy,jorisvandenbossche/numpy,MSeifert04/numpy,pbrod/numpy,rgommers/numpy,ddasilva/numpy,gfyoung/numpy,pdebuyl/numpy,utke1/numpy,numpy/numpy,shoyer/numpy,charris/numpy,tynn/numpy,madphysicist/numpy,Eric89GXL/numpy,anntzer/numpy,tynn/numpy,bertrand-l/numpy,bringingheavendown/numpy,grlee77/numpy,madphysicist/numpy,ContinuumIO/numpy,endolith/numpy,ContinuumIO/numpy,chatcannon/numpy,MSeifert04/numpy,behzadnouri/numpy,mhvk/numpy,mattip/numpy,mhvk/numpy,madphysicist/numpy,anntzer/numpy,ahaldane/numpy,shoyer/numpy,ddasilva/numpy,abalkin/numpy,mattip/numpy,abalkin/numpy,seberg/numpy,jorisvandenbossche/numpy,behzadnouri/numpy,pizzathief/numpy,mhvk/numpy,jakirkham/numpy,ahaldane/numpy,grlee77/numpy,jakirkham/numpy,utke1/numpy,jakirkham/numpy,ddasilva/numpy,ssanderson/numpy,WarrenWeckesser/numpy,ahaldane/numpy,shoyer/numpy,mhvk/numpy,simongibbons/numpy,jakirkham/numpy,pbrod/numpy,pdebuyl/numpy,solarjoe/numpy,WarrenWeckesser/numpy