Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/gmp-source/tests/mpn/t-toom6h.c

@@ -0,0 +1,13 @@
+#define mpn_toomMN_mul mpn_toom6h_mul
+#define mpn_toomMN_mul_itch mpn_toom6h_mul_itch
+
+#define SIZE_LOG 11
+
+/* Smaller sizes not supported; may lead to recursive calls to
+   toom22_mul, toom33_mul, or toom44_mul with invalid input size. */
+#define MIN_AN MUL_TOOM6H_MIN
+#define MIN_BN(an) (MAX ((an*3)>>3, 46))
+
+#define COUNT 1000
+
+#include "toom-shared.h"