teflon/tests: Enable int8 tests

Enable signed 8-bit convolution tests.

Reviewed-by: Tomeu Vizoso <tomeu@tomeuvizoso.net>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31979>

src/gallium/targets/teflon/test_teflon.cpp

@@ -23,7 +23,7 @@
 #define MODEL_TOLERANCE 8
 #define QUANT_TOLERANCE 2
 
-std::vector<bool> is_signed{false}; /* TODO: Support INT8? */
+std::vector<bool> is_signed{false, true};
 std::vector<bool> padding_same{false, true};
 std::vector<int> stride{1, 2};
 std::vector<int> output_channels{1, 32, 120, 128, 160, 256};