build: define EXTRA_PROGRAMS to shut up automake warnings.

tests/Makefile.am

@@ -29,17 +29,18 @@ timeMIpow2div \
 timeMImisc5 \
 timeUPMImul \
 timesqrtmodp \
+timeexp1 \
+timeeuler \
+timecatalan \
+timezeta3 \
+timerecip2adic \
+timediv2adic \
 main
 
-##timeexp1 \
-##timeeuler \
-##timecatalan \
-##timezeta3 \
-##timerecip2adic \
-##timediv2adic \
 
 TESTS = $(ALL_TESTS)
 check_PROGRAMS = $(ALL_TESTS)
+EXTRA_PROGRAMS = $(ALL_TIMINGS)
 
 AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_srcdir)/src \
 -I$(top_builddir)/include -I$(top_builddir)/src