Disable TestHostSnapshot test for non-linux build

Building sdk snapshots on anything other than linux glibc is not
supported at the moment.

Bug: 145598135
Test: m nothing
Change-Id: I34155252545e9f37c5361ed94a27a87024fcece2

sdk/sdk_test.go

@@ -597,6 +597,9 @@ sdk_snapshot {
 }
 
 func TestHostSnapshot(t *testing.T) {
+	// b/145598135 - Generating host snapshots for anything other than linux is not supported.
+	SkipIfNotLinux(t)
+
 	ctx, config := testSdk(t, `
 		sdk {
 			name: "mysdk",
@@ -820,3 +823,10 @@ func TestMain(m *testing.M) {
 
 	os.Exit(run())
 }
+
+func SkipIfNotLinux(t *testing.T) {
+	t.Helper()
+	if android.BuildOs != android.Linux {
+		t.Skipf("Skipping as sdk snapshot generation is only supported on %s not %s", android.Linux, android.BuildOs)
+	}
+}