git: openjdk/mobile: 8233590: Compiler thread creation fails with assert(_c2_count > 0 || _c1_count > 0) failed: No compilers?

[duke]

Changeset: 1c40d6fd
Author:    Jie Fu <fujie at loongson.cn>
Committer: Igor Veresov <iveresov at openjdk.org>
Date:      2019-11-05 09:59:21 +0000
URL:       https://git.openjdk.java.net/mobile/commit/1c40d6fd

8233590: Compiler thread creation fails with assert(_c2_count > 0 || _c1_count > 0) failed: No compilers?

Handle the case with -XX:-TieredCompilation properly

Reviewed-by: shade, thartmann

! src/hotspot/share/runtime/flags/jvmFlagConstraintsCompiler.cpp