Merge pull request hashicorp#4508 from hashicorp/f-solaris-build

Add Solaris builds of Terraform

Author: jen20

scripts/build.sh

@@ -16,7 +16,7 @@ GIT_DIRTY=$(test -n "`git status --porcelain`" && echo "+CHANGES" || true)
 
 # Determine the arch/os combos we're building for
 XC_ARCH=${XC_ARCH:-"386 amd64 arm"}
-XC_OS=${XC_OS:-linux darwin windows freebsd openbsd}
+XC_OS=${XC_OS:-linux darwin windows freebsd openbsd solaris}
 
 
 # Get dependencies unless running in quick mode