Revert "test: Disable 60-math.c test."

This reverts commit bbe6576a66a520d429bb3ec84120ffcce88480bf.

build-aux/check-mescc.sh

@@ -110,6 +110,7 @@ lib/tests/scaffold/51-pointer-sub.c
 lib/tests/scaffold/54-argc.c
 lib/tests/scaffold/54-argv.c
 lib/tests/scaffold/55-char-array.c
+lib/tests/scaffold/60-math.c
 lib/tests/scaffold/61-array.c
 lib/tests/scaffold/62-array.c
 lib/tests/scaffold/63-struct.c
@@ -274,12 +275,6 @@ lib/tests/string/90-snprintf.c
     fi
 fi
 
-# Tests that fail or pass nondeterministically
-BROKEN_TESTS="
-lib/tests/scaffold/60-math.c
-"
-
-
 recheck=${recheck-false}
 test_ext=.c
 log_compiler="${SHELL} ${srcdest}build-aux/test-c.sh"