ci: Mark precision.frexp as unreliable

Add issue for tracking this set of failures.
https://gitlab.freedesktop.org/virgl/virglrenderer/issues/82

And add a previously unseen flavour of this failure.
dEQP-GLES31.functional.shaders.builtin_functions.precision.frexp.highp_vertex.scalar

Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Signed-off-by: Jakob Bornecrantz <jakob@collabora.com>
Signed-off-by: Robert Foss <robert.foss@collabora.com>

ci/previous_results/es_host_softpipe/deqp_gles31/ignore_tests.txt

@@ -1,5 +1,8 @@
 dEQP-GLES31.functional.debug.negative_coverage.get_error.compute.exceed_atomic_counters_limit
+
+# Float precision error https://gitlab.freedesktop.org/virgl/virglrenderer/issues/82
 dEQP-GLES31.functional.shaders.builtin_functions.precision.frexp.highp_fragment.vec4
+dEQP-GLES31.functional.shaders.builtin_functions.precision.frexp.highp_vertex.scalar
 dEQP-GLES31.functional.shaders.builtin_functions.precision.frexp.highp_vertex.vec2
 dEQP-GLES31.functional.shaders.builtin_functions.precision.frexp.lowp_fragment.scalar
 dEQP-GLES31.functional.shaders.builtin_functions.precision.frexp.lowp_fragment.vec4

ci/previous_results/gl_host_softpipe/deqp_gles31/ignore_tests.txt

@@ -2,7 +2,10 @@ dEQP-GLES31.functional.debug.negative_coverage.callbacks.compute.exceed_atomic_c
 dEQP-GLES31.functional.debug.negative_coverage.get_error.compute.exceed_atomic_counters_limit
 dEQP-GLES31.functional.debug.negative_coverage.log.compute.exceed_atomic_counters_limit
 dEQP-GLES31.functional.image_load_store.2d.format_reinterpret.rgba16ui_rgba16f
+
+# Float precision error https://gitlab.freedesktop.org/virgl/virglrenderer/issues/82
 dEQP-GLES31.functional.shaders.builtin_functions.precision.frexp.highp_fragment.vec4
+dEQP-GLES31.functional.shaders.builtin_functions.precision.frexp.highp_vertex.scalar
 dEQP-GLES31.functional.shaders.builtin_functions.precision.frexp.highp_vertex.vec2
 dEQP-GLES31.functional.shaders.builtin_functions.precision.frexp.lowp_fragment.scalar
 dEQP-GLES31.functional.shaders.builtin_functions.precision.frexp.lowp_vertex.scalar