devel/bazel fix build on i386

[ultima]

Summary

• Fix build on i386
• Cleanup Makefile

PR\: 221114
Submitted by\: Klaus Aehlig (maintainer)
Reviewed by\: lifanov (mentor), matthew (mentor)
Approved by\: lifanov (mentor), matthew (mentor)
MFH: 2017Q3
Differential Revision\: https://reviews.freebsd.org/DXXXXX

Test Plan

portlint:
WARN: Makefile: [15]: possible direct use of command "file" found. use ${FILE} instead.
WARN: Makefile: for new port, make $FreeBSD$ tag in comment section empty, to make SVN happy.
WARN: Makefile: unless this is a master port, MAINTAINER has to be set by "=", not by "?=".
WARN: Makefile: "BUILD_DEPENDS" has to appear earlier.
0 fatal errors and 4 warnings found.

False positives mostly. Also finally created a bug for #4 PR 221377

poudriere:
103i386
103amd64
110i386
110amd64
12i386
12amd64

[matthew]

Some complaining about docker related things, but as we're ignoring those no worries.