Add SBOM metadata for symlinks in root directory so they can be included in product SBOMs.

Bug: 272358980
Test: build/soong/tests/sbom_test.sh
Change-Id: I06e6716536c034dee3f6aa03469ad9ccc587dbd5
diff --git a/core/main.mk b/core/main.mk
index b910412..5738cdb 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -2196,7 +2196,8 @@
 	  $(eval _is_linker_config := $(if $(findstring $f,$(SYSTEM_LINKER_CONFIG) $(vendor_linker_config_file)),Y)) \
 	  $(eval _is_partition_compat_symlink := $(if $(findstring $f,$(PARTITION_COMPAT_SYMLINKS)),Y)) \
 	  $(eval _is_flags_file := $(if $(findstring $f, $(ALL_FLAGS_FILES)),Y)) \
-	  $(eval _is_platform_generated := $(_is_build_prop)$(_is_notice_file)$(_is_dexpreopt_image_profile)$(_is_product_system_other_avbkey)$(_is_event_log_tags_file)$(_is_system_other_odex_marker)$(_is_kernel_modules_blocklist)$(_is_fsverity_build_manifest_apk)$(_is_linker_config)$(_is_partition_compat_symlink)$(_is_flags_file)) \
+	  $(eval _is_rootdir_symlink := $(if $(findstring $f, $(ALL_ROOTDIR_SYMLINKS)),Y)) \
+	  $(eval _is_platform_generated := $(_is_build_prop)$(_is_notice_file)$(_is_dexpreopt_image_profile)$(_is_product_system_other_avbkey)$(_is_event_log_tags_file)$(_is_system_other_odex_marker)$(_is_kernel_modules_blocklist)$(_is_fsverity_build_manifest_apk)$(_is_linker_config)$(_is_partition_compat_symlink)$(_is_flags_file)$(_is_rootdir_symlink)) \
 	  $(eval _static_libs := $(ALL_INSTALLED_FILES.$f.STATIC_LIBRARIES)) \
 	  $(eval _whole_static_libs := $(ALL_INSTALLED_FILES.$f.WHOLE_STATIC_LIBRARIES)) \
 	  $(foreach l,$(_static_libs),$(eval _all_static_libs += $l:$(strip $(sort $(ALL_MODULES.$l.PATH))):$(strip $(sort $(ALL_MODULES.$l.SOONG_MODULE_TYPE))):$(ALL_STATIC_LIBRARIES.$l.BUILT_FILE))) \