[libc][tests] pull over printf unit tests from fuchsia

The fuchsia printf unit tests are a derivative of the current LK ones in app/tests, but have been somewhat expanded. Pull in the new copy and add it to the new libc test module.
littlekernel · Apr 24, 2024 · 45155fd · 45155fd
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diff --git a/lib/libc/rules.mk b/lib/libc/rules.mk
@@ -28,6 +28,10 @@ MODULE_COMPILEFLAGS += -fno-builtin
 
 MODULE_OPTIONS := extra_warnings
 
+ifeq ($(call TOBOOL,WITH_TESTS),true)
+MODULE_DEPS += $(LOCAL_DIR)/test
+endif
+
 include $(LOCAL_DIR)/string/rules.mk
 
 include make/module.mk