SSE2 exp and expminus evaluation stubs

PiperOrigin-RevId: 280746585
diff --git a/BUILD.bazel b/BUILD.bazel
index e3545df..7420006 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -515,6 +515,8 @@
     "src/x8-zip/x3-sse2.c",
     "src/x8-zip/x4-sse2.c",
     "src/x8-zip/xm-sse2.c",
+    "src/math/exp-sse2-p5.c",
+    "src/math/expminus-sse2-p5.c",
 ]
 
 SSE41_UKERNELS = [