Scalar F16->F32 evaluation stubs of bitcast-based and fabsf-based variants

PiperOrigin-RevId: 408736740
diff --git a/BUILD.bazel b/BUILD.bazel
index 3bca39c..8db007f 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -665,7 +665,8 @@
     "src/f32-vunary/gen/vsqr-scalar-x1.c",
     "src/f32-vunary/gen/vsqr-scalar-x2.c",
     "src/f32-vunary/gen/vsqr-scalar-x4.c",
-    "src/math/cvt-f32-f16-scalar.c",
+    "src/math/cvt-f32-f16-scalar-bitcast.c",
+    "src/math/cvt-f32-f16-scalar-fabsf.c",
     "src/math/expm1minus-scalar-rr2-lut4-p4.c",
     "src/math/expm1minus-scalar-rr2-lut8-p3.c",
     "src/math/expm1minus-scalar-rr2-lut8-p4.c",