Rename build script to avoid conflict with bazel

It's difficult to include this repository using bazel, because
the file named "build" conflicts with new_go_repository generation
on case-insensitive filesystems (ref
https://github.com/bazelbuild/rules_go/issues/234). This change
renames the file to something that doesn't conflict, and also
renames the test script for consistency.

test.sh

@@ -0,0 +1,80 @@
+#!/usr/bin/env bash
+#
+# Run all CNI tests
+#   ./test
+#   ./test -v
+#
+# Run tests for one package
+#   PKG=./plugins/ipam/dhcp ./test
+#
+set -e
+
+source ./build.sh
+
+TESTABLE="libcni plugins/ipam/dhcp plugins/ipam/host-local plugins/ipam/host-local/backend/allocator plugins/main/loopback pkg/invoke pkg/ns pkg/skel pkg/types pkg/types/current pkg/types/020 pkg/utils plugins/main/ipvlan plugins/main/macvlan plugins/main/bridge plugins/main/ptp plugins/test/noop pkg/utils/hwaddr pkg/ip pkg/version pkg/version/testhelpers plugins/meta/flannel pkg/ipam"
+FORMATTABLE="$TESTABLE pkg/testutils plugins/meta/flannel plugins/meta/tuning"
+
+# user has not provided PKG override
+if [ -z "$PKG" ]; then
+	TEST=$TESTABLE
+	FMT=$FORMATTABLE
+
+# user has provided PKG override
+else
+	# strip out slashes and dots from PKG=./foo/
+	TEST=${PKG//\//}
+	TEST=${TEST//./}
+
+	# only run gofmt on packages provided by user
+	FMT="$TEST"
+fi
+
+# split TEST into an array and prepend REPO_PATH to each local package
+split=(${TEST// / })
+TEST=${split[@]/#/${REPO_PATH}/}
+
+echo -n "Running tests "
+function testrun {
+    sudo -E bash -c "umask 0; PATH=$GOROOT/bin:$(pwd)/bin:$PATH go test -covermode set $@"
+}
+if [ ! -z "${COVERALLS}" ]; then
+    echo "with coverage profile generation..."
+    i=0
+    for t in ${TEST}; do
+        testrun "-coverprofile ${i}.coverprofile ${t}"
+        i=$((i+1))
+    done
+    gover
+    goveralls -service=travis-ci -coverprofile=gover.coverprofile -repotoken=$COVERALLS_TOKEN
+else
+    echo "without coverage profile generation..."
+    testrun "${TEST}"
+fi
+
+echo "Checking gofmt..."
+fmtRes=$(gofmt -l $FMT)
+if [ -n "${fmtRes}" ]; then
+	echo -e "gofmt checking failed:\n${fmtRes}"
+	exit 255
+fi
+
+echo "Checking govet..."
+vetRes=$(go vet $TEST)
+if [ -n "${vetRes}" ]; then
+	echo -e "govet checking failed:\n${vetRes}"
+	exit 255
+fi
+
+echo "Checking license header..."
+licRes=$(
+       for file in $(find . -type f -iname '*.go' ! -path './vendor/*'); do
+               head -n1 "${file}" | grep -Eq "(Copyright|generated)" || echo -e "  ${file}"
+       done
+)
+if [ -n "${licRes}" ]; then
+       echo -e "license header checking failed:\n${licRes}"
+       exit 255
+fi
+
+
+echo "Success"