SkQP: relax 7 tests for Mesa freedreno

This fixes 7 failures on Mesa freedreno since Mesa commit a1c765a44c0
("freedreno/ir3: Consistently lower mediump inputs to 16-bit (when we
can)."):

  c_gms
  glyph_pos_h_b
  gradients_2pt_conical_inside_repeat
  gradients_degenerate_2pt_nodither
  poly2poly
  radial_gradient4
  roundrects

Bug: b/247140770
Test: cts-tradefed

Change-Id: Ia6d03c76c5d3e69e23107b18bafbc1cb31c400ac
1 file changed