Update release script to copy R8 SBOM.

Fixes: b/280466318
Change-Id: I2e1ba01d6c77bccf18bb0448be0243561c067a36
diff --git a/tools/utils.py b/tools/utils.py
index db9844e..06fc3a7 100644
--- a/tools/utils.py
+++ b/tools/utils.py
@@ -720,8 +720,6 @@
         # Build metadata currently not suppported
 
     def larger_than(self, other):
-        if self.prerelease or other.prerelease:
-            raise Exception("Comparison with prerelease not implemented")
         if self.major > other.major:
             return True
         if self.major == other.major and self.minor > other.minor:
@@ -729,6 +727,12 @@
         if self.patch:
             return (self.major == other.major and self.minor == other.minor and
                     self.patch > other.patch)
+        if self.prerelease:
+            if other.prerelease:
+                return self.prerelease > other.prerelease
+            else:
+                return False
+
         else:
             return False