test: Add a 'make qcheck' target for quicker testing

At present tests are quite slow to run, over a minute on my machine. This
presents a considerable barrier to bisecting for failures.

The slowest tests are the filesystem ones and the buildman --fetch-arch
test. Add a new 'qcheck' target that skips these tests. This reduces test
time down to about 40 second, still too long, but bearable.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/Makefile b/Makefile
index a4b1d1d..2c607d5 100644
--- a/Makefile
+++ b/Makefile
@@ -443,7 +443,7 @@
 
 no-dot-config-targets := clean clobber mrproper distclean \
 			 help %docs check% coccicheck \
-			 ubootversion backup tests
+			 ubootversion backup tests check qcheck
 
 config-targets := 0
 mixed-targets  := 0
@@ -1727,6 +1727,7 @@
 	@echo  'Test targets:'
 	@echo  ''
 	@echo  '  check           - Run all automated tests that use sandbox'
+	@echo  '  qcheck          - Run quick automated tests that use sandbox'
 	@echo  ''
 	@echo  'Other generic targets:'
 	@echo  '  all		  - Build all necessary images depending on configuration'
@@ -1769,6 +1770,9 @@
 tests check:
 	$(srctree)/test/run
 
+qcheck:
+	$(srctree)/test/run quick
+
 # Documentation targets
 # ---------------------------------------------------------------------------
 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \