[libc][obvious] Fix link order of math tests.

GitOrigin-RevId: f768eb216f5924219c845515c606ab0703825634
diff --git a/test/src/math/CMakeLists.txt b/test/src/math/CMakeLists.txt
index f5a1e0e..e73de54 100644
--- a/test/src/math/CMakeLists.txt
+++ b/test/src/math/CMakeLists.txt
@@ -18,10 +18,10 @@
 
   add_libc_unittest(${name} ${MATH_UNITTEST_UNPARSED_ARGUMENTS})
   get_fq_target_name(${name} fq_target_name)
-  target_link_libraries(${fq_target_name} PRIVATE LibcFPTestHelpers)
   if(MATH_UNITTEST_NEED_MPFR)
     target_link_libraries(${fq_target_name} PRIVATE libcMPFRWrapper -lmpfr -lgmp)
   endif()
+  target_link_libraries(${fq_target_name} PRIVATE LibcFPTestHelpers)
 endfunction(add_fp_unittest)
 
 add_fp_unittest(