[gcc(refs/users/meissner/heads/work221-orig)] Add REVISION.

[Michael Meissner]

https://gcc.gnu.org/g:9c2730793df153c654490fd09572ac3fa3785b18

commit 9c2730793df153c654490fd09572ac3fa3785b18
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Mon Sep 8 13:59:06 2025 -0400

    Add REVISION.
    
    2025-09-08  Michael Meissner  <meissner@linux.ibm.com>
    
    gcc/
    
            * REVISION: New file for branch.

Diff:
---
 gcc/REVISION | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gcc/REVISION b/gcc/REVISION
new file mode 100644
index 000000000000..9bd42120718c
--- /dev/null
+++ b/gcc/REVISION
@@ -0,0 +1 @@
+work221-orig branch