Make the host test build use the common NOECHO= flag.

Change-Id: I4250290ae5811afd8564117b7c37f24be5570a39
diff --git a/make/generic_compile.mk b/make/generic_compile.mk
index 22762e1..3cf3e1a 100644
--- a/make/generic_compile.mk
+++ b/make/generic_compile.mk
@@ -55,7 +55,6 @@
 GENERIC_OBJS := $(strip $(GENERIC_C_OBJS) $(GENERIC_CC_OBJS) $(GENERIC_CPP_OBJS))
 
 # Bind inputs.
-$(GENERIC_OBJS): NOECHO := @
 $(GENERIC_OBJS): CC := $(GENERIC_CC)
 $(GENERIC_OBJS): FLAGS := $(GENERIC_FLAGS)
 $(GENERIC_OBJS): CFLAGS := $(GENERIC_CFLAGS)
diff --git a/make/host_test.mk b/make/host_test.mk
index db3c948..a49f86b 100644
--- a/make/host_test.mk
+++ b/make/host_test.mk
@@ -57,14 +57,14 @@
 $(HOST_TEST_BIN): $(GENERIC_OBJS)
 	@echo linking $@
 	@$(MKDIR)
-	@$(CC) $^ $(LDFLAGS) -o $@
+	$(NOECHO)$(CC) $^ $(LDFLAGS) -o $@
 
 # Aliases
 host_tests: $(HOST_TEST_BIN)
 
 run_$(HOST_TEST): $(HOST_TEST_BIN) .PHONY
 	@echo running $<
-	@gdb -batch -ex run -ex where $<
+	$(NOECHO)gdb -batch -ex run -ex where $<
 
 run_host_tests: run_$(HOST_TEST) .PHONY