Add a temporary step to cp corehost to /usr/local/bin
Add a temporary step to cp corehost to /usr/local/bin

This is a temporary fix to unblock dotnet compile on OS X. It copies the corehost
from the install location to /usr/local/bin in postinstall.

Fix 294

dasMulli/cli,MichaelSimons/cli,danquirk/cli,jaredpar/cli,krwq/cli,gkhanna79/cli,mlorbetske/cli,schellap/cli,mlorbetske/cli,weshaggard/cli,JohnChen0/cli,JohnChen0/cli,AbhitejJohn/cli,blackdwarf/cli,FubarDevelopment/cli,danquirk/cli,MichaelSimons/cli,mlorbetske/cli,blackdwarf/cli,stuartleeks/dotnet-cli,jonsequitur/cli,mylibero/cli,naamunds/cli,marono/cli,FubarDevelopment/cli,mylibero/cli,MichaelSimons/cli,Faizan2304/cli,danquirk/cli,marono/cli,EdwardBlair/cli,johnbeisner/cli,Faizan2304/cli,marono/cli,schellap/cli,Faizan2304/cli,krwq/cli,stuartleeks/dotnet-cli,borgdylan/dotnet-cli,nguerrera/cli,livarcocc/cli-1,stuartleeks/dotnet-cli,svick/cli,AbhitejJohn/cli,jonsequitur/cli,gkhanna79/cli,krwq/cli,gkhanna79/cli,svick/cli,jkotas/cli,nguerrera/cli,nguerrera/cli,AbhitejJohn/cli,weshaggard/cli,FubarDevelopment/cli,harshjain2/cli,ravimeda/cli,mylibero/cli,dasMulli/cli,jkotas/cli,jaredpar/cli,livarcocc/cli-1,gkhanna79/cli,naamunds/cli,ravimeda/cli,borgdylan/dotnet-cli,jaredpar/cli,schellap/cli,borgdylan/dotnet-cli,stuartleeks/dotnet-cli,AbhitejJohn/cli,EdwardBlair/cli,jaredpar/cli,stuartleeks/dotnet-cli,gkhanna79/cli,svick/cli,MichaelSimons/cli,JohnChen0/cli,JohnChen0/cli,naamunds/cli,krwq/cli,anurse/Cli,johnbeisner/cli,jaredpar/cli,FubarDevelopment/cli,naamunds/cli,harshjain2/cli,nguerrera/cli,ravimeda/cli,johnbeisner/cli,weshaggard/cli,danquirk/cli,livarcocc/cli-1,marono/cli,mylibero/cli,jaredpar/cli,naamunds/cli,EdwardBlair/cli,weshaggard/cli,schellap/cli,danquirk/cli,mlorbetske/cli,MichaelSimons/cli,jkotas/cli,krwq/cli,harshjain2/cli,jkotas/cli,borgdylan/dotnet-cli,mylibero/cli,jkotas/cli,jonsequitur/cli,marono/cli,dasMulli/cli,weshaggard/cli,schellap/cli,jonsequitur/cli,blackdwarf/cli,blackdwarf/cli,schellap/cli,borgdylan/dotnet-cli