soong_config: Add TARGET_HAS_LEGACY_CAMERA_HAL1 variable

* Soong product variable 'has_legacy_camera_hal1'

Change-Id: I10800cba0c431297b5d7aad6e97d57a01232d73e
Signed-off-by: Adrian DC <radian.dc@gmail.com>
diff --git a/build/soong/soong_config.mk b/build/soong/soong_config.mk
index 4058207..0004325 100644
--- a/build/soong/soong_config.mk
+++ b/build/soong/soong_config.mk
@@ -4,6 +4,7 @@
 	$(hide) (\
 	echo '{'; \
 	echo '"Lineage": {'; \
+	echo '    "Has_legacy_camera_hal1": $(if $(filter true,$(TARGET_HAS_LEGACY_CAMERA_HAL1)),true,false),'; \
 	echo '    "Needs_text_relocations": $(if $(filter true,$(TARGET_NEEDS_PLATFORM_TEXT_RELOCATIONS)),true,false),'; \
 	echo '    "Specific_camera_parameter_library": "$(TARGET_SPECIFIC_CAMERA_PARAMETER_LIBRARY)",'; \
 	echo '    "Target_shim_libs": "$(subst $(space),:,$(TARGET_LD_SHIM_LIBS))",'; \