ltp-testsuite: add numactl as optional dependency

Make the detection of libnuma in the configure script consistent when
the numactl package is enabled.

ltp-testsuite does not currently take explicit enable/disable for
libnuma, so none are used. The next ltp-testsuite version will add these
options.

Cc: Petr Vorel <petr.vorel@gmail.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/ltp-testsuite/ltp-testsuite.mk

@@ -40,6 +40,13 @@ else
 LTP_TESTSUITE_CONF_ENV += ac_cv_lib_cap_cap_compare=no
 endif
 
+# No explicit enable/disable options
+ifeq ($(BR2_PACKAGE_NUMACTL),y)
+LTP_TESTSUITE_DEPENDENCIES += numactl
+else
+LTP_TESTSUITE_CONF_ENV += have_numa_headers=no
+endif
+
 # ltp-testsuite uses <fts.h>, which isn't compatible with largefile
 # support.
 LTP_TESTSUITE_CFLAGS = $(filter-out -D_FILE_OFFSET_BITS=64,$(TARGET_CFLAGS))