tests: run the main test suite on "make check"

[Akim Demaille]

commit de93a0728b59fe81e8972aca08812f033fd9069b
Author: Akim Demaille <akim.demaille@gmail.com>
Date:   Sat Jan 30 09:05:10 2021 +0100

    tests: run the main test suite on "make check"
    
    Automake appears to not recognize "check-local" when it is not a
    isolated target.  Fixes 77a8b84fc8bbe39dc231a1f657fd56a50fac5855.
    
    * tests/local.mk (check-local): Make it visible to Automake.

diff --git a/tests/local.mk b/tests/local.mk
index 56eac3cce..3efc69d8b 100644
--- a/tests/local.mk
+++ b/tests/local.mk
@@ -114,8 +114,10 @@ recheck: $(RUN_TESTSUITE_deps)
             -e 'eof && /^(\d+).*: FAILED/ && print "$$1 "'     \
                %D%/testsuite.dir/*/testsuite.log)
 
+check-local: check-tests
+
 .PHONY: check-tests
-check-local check-tests: $(RUN_TESTSUITE_deps)
+check-tests: $(RUN_TESTSUITE_deps)
        $(RUN_TESTSUITE)
 
 # Run the test suite on the *installed* tree.