lkl: fix default build target to include progs

lklfuse, fs2tar and cptofs were accidentally dropped from the default
build target via a typo in commit 6d360d164e5d5 ("lkl: link tests
against common private library").
The install target was still triggering progs-y builds, which is
probably why this took longer to notice than expected.

Fixes: 6d360d164e5d5 ("lkl: link tests against common private library")
Signed-off-by: David Disseldorp <ddiss@suse.de>
(cherry picked from commit 191e6381bcf418092644217723001bca7c154c45)
Link: lkl/linux#617

Author: ddiss

tools/lkl/Makefile

@@ -53,7 +53,7 @@ export CFLAGS += -I$(OUTPUT)/include -Iinclude -Wall -g -O2 -Wextra \
 include Targets
 
 TARGETS := $(progs-y:%=$(OUTPUT)%$(EXESUF))
-TARGETS := $(tests-y:%=$(OUTPUT)%$(EXESUF))
+TARGETS += $(tests-y:%=$(OUTPUT)%$(EXESUF))
 TARGETS += $(libs-y:%=$(OUTPUT)%$(SOSUF))
 all: $(TARGETS)