scons command: fix one more issue related to build dir.
scons command: fix one more issue related to build dir.

The distutils installation directory relative to the scons build directory was
not always computed right. The relative position on the fs does not depend on
the source directory (in out-of-place builds), but on the package *name*
translated to a directly only.


ahaldane/numpy,behzadnouri/numpy,has2k1/numpy,charris/numpy,chatcannon/numpy,jschueller/numpy,ogrisel/numpy,skymanaditya1/numpy,groutr/numpy,anntzer/numpy,mathdd/numpy,dato-code/numpy,mwiebe/numpy,mingwpy/numpy,felipebetancur/numpy,moreati/numpy,cowlicks/numpy,behzadnouri/numpy,jschueller/numpy,Linkid/numpy,Yusa95/numpy,BMJHayward/numpy,naritta/numpy,madphysicist/numpy,ChanderG/numpy,anntzer/numpy,pdebuyl/numpy,abalkin/numpy,skymanaditya1/numpy,Yusa95/numpy,astrofrog/numpy,trankmichael/numpy,naritta/numpy,simongibbons/numpy,trankmichael/numpy,simongibbons/numpy,WarrenWeckesser/numpy,embray/numpy,pdebuyl/numpy,ogrisel/numpy,maniteja123/numpy,mingwpy/numpy,moreati/numpy,immerrr/numpy,ESSS/numpy,skwbc/numpy,skwbc/numpy,ogrisel/numpy,kiwifb/numpy,ESSS/numpy,argriffing/numpy,brandon-rhodes/numpy,githubmlai/numpy,rherault-insa/numpy,gfyoung/numpy,MaPePeR/numpy,jakirkham/numpy,tynn/numpy,numpy/numpy-refactor,b-carter/numpy,SunghanKim/numpy,yiakwy/numpy,jorisvandenbossche/numpy,ssanderson/numpy,grlee77/numpy,mathdd/numpy,dato-code/numpy,Srisai85/numpy,WillieMaddox/numpy,mhvk/numpy,kirillzhuravlev/numpy,nbeaver/numpy,bmorris3/numpy,dch312/numpy,pelson/numpy,pelson/numpy,rmcgibbo/numpy,stefanv/numpy,NextThought/pypy-numpy,grlee77/numpy,mortada/numpy,rudimeier/numpy,ContinuumIO/numpy,nbeaver/numpy,dwf/numpy,utke1/numpy,ogrisel/numpy,stuarteberg/numpy,mattip/numpy,ChristopherHogan/numpy,empeeu/numpy,matthew-brett/numpy,Yusa95/numpy,mattip/numpy,endolith/numpy,ekalosak/numpy,ddasilva/numpy,endolith/numpy,gmcastil/numpy,abalkin/numpy,WarrenWeckesser/numpy,MSeifert04/numpy,rgommers/numpy,pbrod/numpy,sigma-random/numpy,ekalosak/numpy,jakirkham/numpy,dwillmer/numpy,NextThought/pypy-numpy,mhvk/numpy,simongibbons/numpy,pdebuyl/numpy,skwbc/numpy,endolith/numpy,gmcastil/numpy,MSeifert04/numpy,jonathanunderwood/numpy,dwillmer/numpy,sigma-random/numpy,ChanderG/numpy,leifdenby/numpy,BabeNovelty/numpy,BabeNovelty/numpy,ChristopherHogan/numpy,jorisvandenbossche/numpy,Eric89GXL/numpy,pelson/numpy,Eric89GXL/numpy,trankmichael/numpy,moreati/numpy,ahaldane/numpy,AustereCuriosity/numpy,njase/numpy,njase/numpy,rhythmsosad/numpy,astrofrog/numpy,KaelChen/numpy,numpy/numpy,jorisvandenbossche/numpy,larsmans/numpy,simongibbons/numpy,shoyer/numpy,pizzathief/numpy,MSeifert04/numpy,sinhrks/numpy,kirillzhuravlev/numpy,Linkid/numpy,dimasad/numpy,argriffing/numpy,sigma-random/numpy,CMartelLML/numpy,dch312/numpy,matthew-brett/numpy,KaelChen/numpy,WarrenWeckesser/numpy,bertrand-l/numpy,BabeNovelty/numpy,sonnyhu/numpy,rhythmsosad/numpy,bmorris3/numpy,has2k1/numpy,stefanv/numpy,rherault-insa/numpy,Eric89GXL/numpy,mhvk/numpy,bmorris3/numpy,CMartelLML/numpy,charris/numpy,ahaldane/numpy,MSeifert04/numpy,BMJHayward/numpy,sinhrks/numpy,has2k1/numpy,numpy/numpy,ewmoore/numpy,jankoslavic/numpy,chiffa/numpy,Anwesh43/numpy,Eric89GXL/numpy,musically-ut/numpy,Srisai85/numpy,WarrenWeckesser/numpy,pbrod/numpy,BMJHayward/numpy,larsmans/numpy,shoyer/numpy,CMartelLML/numpy,ahaldane/numpy,cowlicks/numpy,pbrod/numpy,joferkington/numpy,cowlicks/numpy,jakirkham/numpy,dimasad/numpy,githubmlai/numpy,stefanv/numpy,b-carter/numpy,stefanv/numpy,ChanderG/numpy,numpy/numpy,GaZ3ll3/numpy,tynn/numpy,jankoslavic/numpy,Anwesh43/numpy,mattip/numpy,argriffing/numpy,anntzer/numpy,GrimDerp/numpy,leifdenby/numpy,bringingheavendown/numpy,MichaelAquilina/numpy,matthew-brett/numpy,andsor/numpy,rhythmsosad/numpy,GrimDerp/numpy,ewmoore/numpy,pbrod/numpy,ViralLeadership/numpy,ddasilva/numpy,mhvk/numpy,brandon-rhodes/numpy,seberg/numpy,hainm/numpy,nbeaver/numpy,rajathkumarmp/numpy,tdsmith/numpy,astrofrog/numpy,drasmuss/numpy,rajathkumarmp/numpy,sonnyhu/numpy,Dapid/numpy,MichaelAquilina/numpy,behzadnouri/numpy,mindw/numpy,pizzathief/numpy,nguyentu1602/numpy,mingwpy/numpy,anntzer/numpy,dato-code/numpy,rgommers/numpy,SunghanKim/numpy,kirillzhuravlev/numpy,tdsmith/numpy,andsor/numpy,kirillzhuravlev/numpy,Linkid/numpy,grlee77/numpy,Srisai85/numpy,seberg/numpy,rmcgibbo/numpy,jankoslavic/numpy,pyparallel/numpy,endolith/numpy,ChanderG/numpy,gfyoung/numpy,gfyoung/numpy,cjermain/numpy,dimasad/numpy,tacaswell/numpy,stuarteberg/numpy,solarjoe/numpy,jorisvandenbossche/numpy,githubmlai/numpy,charris/numpy,cjermain/numpy,njase/numpy,andsor/numpy,mortada/numpy,madphysicist/numpy,mattip/numpy,MichaelAquilina/numpy,mathdd/numpy,GrimDerp/numpy,trankmichael/numpy,ahaldane/numpy,groutr/numpy,mindw/numpy,KaelChen/numpy,dwf/numpy,groutr/numpy,jschueller/numpy,ewmoore/numpy,MichaelAquilina/numpy,GrimDerp/numpy,mhvk/numpy,has2k1/numpy,nguyentu1602/numpy,AustereCuriosity/numpy,mathdd/numpy,dato-code/numpy,andsor/numpy,pizzathief/numpy,ajdawson/numpy,empeeu/numpy,GaZ3ll3/numpy,ajdawson/numpy,simongibbons/numpy,embray/numpy,ContinuumIO/numpy,jschueller/numpy,hainm/numpy,AustereCuriosity/numpy,chiffa/numpy,empeeu/numpy,SunghanKim/numpy,shoyer/numpy,rmcgibbo/numpy,stuarteberg/numpy,naritta/numpy,solarjoe/numpy,nguyentu1602/numpy,pyparallel/numpy,chatcannon/numpy,Srisai85/numpy,Anwesh43/numpy,felipebetancur/numpy,embray/numpy,SiccarPoint/numpy,shoyer/numpy,rgommers/numpy,rudimeier/numpy,bertrand-l/numpy,rhythmsosad/numpy,BMJHayward/numpy,astrofrog/numpy,rherault-insa/numpy,madphysicist/numpy,numpy/numpy-refactor,rgommers/numpy,brandon-rhodes/numpy,immerrr/numpy,hainm/numpy,ewmoore/numpy,SunghanKim/numpy,jakirkham/numpy,rmcgibbo/numpy,pelson/numpy,WarrenWeckesser/numpy,stuarteberg/numpy,NextThought/pypy-numpy,yiakwy/numpy,felipebetancur/numpy,ajdawson/numpy,NextThought/pypy-numpy,githubmlai/numpy,mindw/numpy,mwiebe/numpy,yiakwy/numpy,ssanderson/numpy,numpy/numpy-refactor,embray/numpy,cjermain/numpy,numpy/numpy,chatcannon/numpy,tdsmith/numpy,MSeifert04/numpy,abalkin/numpy,embray/numpy,ddasilva/numpy,SiccarPoint/numpy,pdebuyl/numpy,cowlicks/numpy,cjermain/numpy,rudimeier/numpy,hainm/numpy,pizzathief/numpy,Anwesh43/numpy,jorisvandenbossche/numpy,mortada/numpy,seberg/numpy,BabeNovelty/numpy,jonathanunderwood/numpy,pelson/numpy,charris/numpy,sonnyhu/numpy,jonathanunderwood/numpy,tacaswell/numpy,leifdenby/numpy,drasmuss/numpy,ssanderson/numpy,yiakwy/numpy,ContinuumIO/numpy,joferkington/numpy,dwf/numpy,ekalosak/numpy,jakirkham/numpy,madphysicist/numpy,mwiebe/numpy,shoyer/numpy,brandon-rhodes/numpy,grlee77/numpy,tynn/numpy,CMartelLML/numpy,Dapid/numpy,tdsmith/numpy,pizzathief/numpy,Dapid/numpy,numpy/numpy-refactor,MaPePeR/numpy,joferkington/numpy,utke1/numpy,bmorris3/numpy,SiccarPoint/numpy,Yusa95/numpy,nguyentu1602/numpy,dch312/numpy,rudimeier/numpy,madphysicist/numpy,musically-ut/numpy,musically-ut/numpy,sonnyhu/numpy,bringingheavendown/numpy,mindw/numpy,solarjoe/numpy,tacaswell/numpy,kiwifb/numpy,Linkid/numpy,immerrr/numpy,WillieMaddox/numpy,MaPePeR/numpy,numpy/numpy-refactor,matthew-brett/numpy,musically-ut/numpy,immerrr/numpy,sinhrks/numpy,jankoslavic/numpy,dwillmer/numpy,sinhrks/numpy,WillieMaddox/numpy,skymanaditya1/numpy,dwf/numpy,astrofrog/numpy,mingwpy/numpy,dch312/numpy,stefanv/numpy,grlee77/numpy,ViralLeadership/numpy,GaZ3ll3/numpy,dimasad/numpy,pyparallel/numpy,naritta/numpy,SiccarPoint/numpy,dwillmer/numpy,ChristopherHogan/numpy,KaelChen/numpy,rajathkumarmp/numpy,empeeu/numpy,kiwifb/numpy,ewmoore/numpy,skymanaditya1/numpy,maniteja123/numpy,rajathkumarmp/numpy,matthew-brett/numpy,ajdawson/numpy,felipebetancur/numpy,bertrand-l/numpy,larsmans/numpy,seberg/numpy,mortada/numpy,chiffa/numpy,utke1/numpy,gmcastil/numpy,bringingheavendown/numpy,joferkington/numpy,GaZ3ll3/numpy,dwf/numpy,ekalosak/numpy,ogrisel/numpy,ChristopherHogan/numpy,ViralLeadership/numpy,ESSS/numpy,b-carter/numpy,larsmans/numpy,maniteja123/numpy,drasmuss/numpy,MaPePeR/numpy,pbrod/numpy,sigma-random/numpy