ANDROID: kbuild: use modules.order in adjust_autoksyms.sh

This is essentially a partial backport of b7dca6dd1e ("kbuild: create
*.mod with full directory path and remove MODVERDIR") as a full backport
would pull in too many dependencies.

It is necessary to simplify the backport of the TRIM_NONLISTED_KMI
feature.

Bug: 148277666
Change-Id: Ibf85bf864b3961d5bec4965742f08a80e9f234af
Signed-off-by: Quentin Perret <qperret@google.com>

scripts/adjust_autoksyms.sh

@@ -10,8 +10,7 @@
 # published by the Free Software Foundation.
 
 # Create/update the include/generated/autoksyms.h file from the list
-# of all module's needed symbols as recorded on the third line of
-# .tmp_versions/*.mod files.
+# of all module's needed symbols as recorded on the third line of *.mod files.
 #
 # For each symbol being added or removed, the corresponding dependency
 # file's timestamp is updated to force a rebuild of the affected source
@@ -49,13 +48,10 @@ cat > "$new_ksyms_file" << EOT
  */
 
 EOT
-[ "$(ls -A "$MODVERDIR")" ] &&
-for mod in "$MODVERDIR"/*.mod; do
-	sed -n -e '3{s/ /\n/g;/^$/!p;}' "$mod"
-done | sort -u |
-while read sym; do
-	echo "#define __KSYM_${sym} 1"
-done >> "$new_ksyms_file"
+sed 's/ko$/mod/' modules.order |
+xargs -n1 sed -n -e '3{s/ /\n/g;/^$/!p;}' -- |
+sort -u |
+sed -e 's/\(.*\)/#define __KSYM_\1 1/' >> "$new_ksyms_file"
 
 # Special case for modversions (see modpost.c)
 if [ -n "$CONFIG_MODVERSIONS" ]; then