configure: Fix libnuma detection logic

Test Plan: Validate with numa support

Subscribers: rwbarton, thomie, erikd, carter

Differential Revision: https://phabricator.haskell.org/D4869

configure.ac

@@ -1263,7 +1263,7 @@ if test "$ac_cv_header_numa_h$ac_cv_header_numaif_h" = "yesyes" ; then
     AC_CHECK_LIB(numa, numa_available,HaveLibNuma=1)
 fi
 AC_DEFINE_UNQUOTED([HAVE_LIBNUMA], [$HaveLibNuma], [Define to 1 if you have libnuma])
-if test $HaveLibNuma = "YES" ; then
+if test $HaveLibNuma = "1" ; then
   AC_SUBST([CabalHaveLibNuma],[True])
 else
   AC_SUBST([CabalHaveLibNuma],[False])