http/cgi: add openbsd environment configuration

R=iant, iant
CC=golang-dev
https://golang.org/cl/5016051

src/pkg/http/cgi/host.go

@@ -37,6 +37,7 @@ var osDefaultInheritEnv = map[string][]string{
 	"hpux":    {"LD_LIBRARY_PATH", "SHLIB_PATH"},
 	"irix":    {"LD_LIBRARY_PATH", "LD_LIBRARYN32_PATH", "LD_LIBRARY64_PATH"},
 	"linux":   {"LD_LIBRARY_PATH"},
+	"openbsd": {"LD_LIBRARY_PATH"},
 	"solaris": {"LD_LIBRARY_PATH", "LD_LIBRARY_PATH_32", "LD_LIBRARY_PATH_64"},
 	"windows": {"SystemRoot", "COMSPEC", "PATHEXT", "WINDIR"},
 }