Evaluation stubs for WAsm SIMD F32->F16 conversion

PiperOrigin-RevId: 408510470
diff --git a/BUILD.bazel b/BUILD.bazel
index ad0151d..0765dacb 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -1790,6 +1790,7 @@
     "src/f32-vunary/gen/vsqr-wasmsimd-x8.c",
     "src/math/cvt-f16-f32-wasmsimd-int16.c",
     "src/math/cvt-f16-f32-wasmsimd-int32.c",
+    "src/math/cvt-f32-f16-wasmsimd.c",
     "src/math/expm1minus-wasmsimd-rr2-lut16-p3-andnot.c",
     "src/math/expm1minus-wasmsimd-rr2-lut16-p3-max.c",
     "src/math/expm1minus-wasmsimd-rr2-p6-andnot.c",