Normalize filepath comment for gen files in build.prop

build.prop contains a `# from $filepath` comment to log the origin of a
sysprop. This is useful to have, but causes the metadata of
vendor/build.prop to be different between make and soong built
partitions. This CL replaces the absolute filepath of generated files
with their filenames in the build.prop comment.

Bug: 382295862
Test: commented out notice files in build/make/core/Makefile
Test: lunch aosp_cf_x86_64_phone-trunk_staging-userdebug
Test: export BUILD_DATETIME=10
Test: verified that vendor.img built by make and soong have the same
sha

Change-Id: Ib0caad5fa0171c39317646e49372a69534a42af0
diff --git a/fsgen/filesystem_creator.go b/fsgen/filesystem_creator.go
index 765b28f..4f1a34f 100644
--- a/fsgen/filesystem_creator.go
+++ b/fsgen/filesystem_creator.go
@@ -573,9 +573,11 @@
 		Name                  *string
 		Board_info_files      []string
 		Bootloader_board_name *string
+		Stem                  *string
 	}{
-		Name:             proptools.StringPtr(generatedModuleName(ctx.Config(), "android-info.prop")),
+		Name:             proptools.StringPtr(generatedModuleName(ctx.Config(), "android_info.prop")),
 		Board_info_files: partitionVars.BoardInfoFiles,
+		Stem:             proptools.StringPtr("android_info.txt"),
 	}
 	if len(androidInfoProps.Board_info_files) == 0 {
 		androidInfoProps.Bootloader_board_name = proptools.StringPtr(partitionVars.BootLoaderBoardName)