misc/android: evaluate symlinks before comparing GOROOT and GOPATH
misc/android: evaluate symlinks before comparing GOROOT and GOPATH

Should fix Android builders on Darwin hosts.

Change-Id: I1554849bdf2ad2440529af7f93566fa6f11d5407
Reviewed-on: https://go-review.googlesource.com/c/164697
Run-TryBot: Elias Naur <1d6e1cf70ec6f9ab28d3ea4b27a49a77654d370e@eliasnaur.com>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

cloudflare/go,nawawi/go,golang/go,CAFxX/go,akutz/go,nawawi/go,cloudflare/go,golang/go,cloudflare/go,nawawi/go,CAFxX/go,CAFxX/go,golang/go,CAFxX/go,josharian/go,golang/go,golang/go,josharian/go,nawawi/go,akutz/go,josharian/go,akutz/go,nawawi/go,cloudflare/go,akutz/go,cloudflare/go,josharian/go,golang/go,CAFxX/go,josharian/go,akutz/go,golang/go,akutz/go,akutz/go,josharian/go,golang/go,akutz/go,nawawi/go,josharian/go,nawawi/go,cloudflare/go,cloudflare/go,CAFxX/go,CAFxX/go,cloudflare/go,CAFxX/go,josharian/go,nawawi/go