mesa: increase MaxServerWaitTimeout

The current value was introduced in commit a27180d0d8, which claims
that it represents ~1.11 years. However, it is interpreted in nanoseconds,
so it actually only represents ~9.8 hours. That seems a bit short.

Use the largest value consistent with both int32 and int64. It
corresponds to ~292 years in nanoseconds.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

src/mesa/main/context.c

@@ -654,7 +654,7 @@ _mesa_init_constants(struct gl_constants *consts, gl_api api)
    consts->UniformBooleanTrue = FLOAT_AS_UNION(1.0f).u;
 
    /* GL_ARB_sync */
-   consts->MaxServerWaitTimeout = 0x1fff7fffffffULL;
+   consts->MaxServerWaitTimeout = 0x7fffffff7fffffffULL;
 
    /* GL_EXT_provoking_vertex */
    consts->QuadsFollowProvokingVertexConvention = GL_TRUE;