etnaviv/vivante Update

Lucas Stach suggested I also run the test (glmark2-es2) with --off-screen. Here are those results from a recent build.

Note that the etnaviv test

• will sometimes segfault (usually somewhere in the [conditionals] tests)
• the [ideas] test sometimes will cause a GPU hangcheck
• and the [terrain] test complains saying "etna_draw_vbo:199: compiled shaders are not okay"

	wandboard
GL_VENDOR	Vivante Corporation			etnaviv
GL_RENDERER	Vivante GC880			Gallium 0.4 on Vivante GC880 rev 5106
GL_VERSION	OpenGL ES 3.0 V5.0.11.p8.41671			OpenGL ES 2.0 Mesa 17.1.1
glmark2 score	116	52	193	47	56	138
/proc/loadavg	0.41	0.15	0.15	0.26	0.50	0.15
		--fullscreen	--off-screen		--fullscreen	--off-screen
[build]	204	141	451	80	136	437
[build]	259	158	713	84	160	614
[texture]	201	114	523	76	108	294
[texture]	202	113	492	76	100	286
[texture]	199	109	478	75	97	259
[shading]	205	122	392	81	119	335
[shading]	170	61	184	70	76	160
[shading]	108	39	111	51	52	97
[shading]	81	30	83	42	39	69
[bump]	124	55	128	57	69	119
[bump]	230	72	281	78	98	236
[bump]	203	61	223	70	73	163
[effect2d]	62	15	68	33	26	47
[effect2d]	23	5	23	14	9	16
[pulsar]	185	84	414	75	102	372
[desktop]	31	9	31	15	10	18
[desktop]	104	33	122	42	39	71
[buffer]	48	32	53	30	33	46
[buffer]	49	32	52	29	32	47
[buffer]	55	35	62	36	38	51
[ideas]	44	44	43	51	0	0
[jellyfish]	61	19	62	29	23	38
[terrain]	1	0	1	2	1	2
[shadow]	92	29	107	38	34	62
[refract]	20	9	20	10	8	11
[conditionals]	209	77	383	69	78	169
[conditionals]	61	19	65	33	26	47
[conditionals]	204	76	347	65	76	159
[function]	114	36	130	49	47	90
[function]	34	11	35	30	24	42
[loop]	105	34	119	49	46	88
[loop]	105	34	119	49	45	88
[loop]	55	18	69	30	24	42