[dev.link] cmd/dist: reenable shared library tests

Change-Id: Ifa4de9333b9275d832ebf68c89d3239ed438b104
Reviewed-on: https://go-review.googlesource.com/c/go/+/201819
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>

src/cmd/dist/test.go

@@ -681,7 +681,7 @@ func (t *tester) registerTests() {
 		if t.supportedBuildmode("c-shared") {
 			t.registerHostTest("testcshared", "../misc/cgo/testcshared", "misc/cgo/testcshared", ".")
 		}
-		if t.supportedBuildmode("shared") && false { // TODO: newobj
+		if t.supportedBuildmode("shared") {
 			t.registerTest("testshared", "../misc/cgo/testshared", t.goTest(), t.timeout(600), ".")
 		}
 		if t.supportedBuildmode("plugin") {