build: Allow 'make quickcheck' test-tool args to be overridden.

A typical use for this is for packagers who want to increase
the default timeout:

  make quickcheck QUICKCHECK_TEST_TOOL_ARGS="-t 300"

(Cherry picked from commit 806b6e01506dea4eae68ac3e468d9398d63cafcb)

diff --git a/Makefile.am b/Makefile.am
index acd8efc..c6a02e1 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -192,7 +192,7 @@ CLEANFILES = \
 # is NOT a substitute for proper testing!
 
 quickcheck:
-       test-tool/run-test-tool-locally
+       test-tool/run-test-tool-locally $(QUICKCHECK_TEST_TOOL_ARGS)
 
 # Make binary distribution.