release 15.2.0-r6, 14.3.0-r6, 13.4.0-r6

Author: CyanoHao

module/profile.py

@@ -176,7 +176,7 @@ def __init__(
   ),
   '15': BranchVersions(
     gcc = '15.2.0',
-    rev = '5.1',
+    rev = '6',
 
     # ABI critical: 2025-08-08
     mcfgthread = '2.1-ga.1',
@@ -198,7 +198,7 @@ def __init__(
   ),
   '14': BranchVersions(
     gcc = '14.3.0',
-    rev = '5.1',
+    rev = '6',
 
     # ABI critical: 2024-08-01
     mcfgthread = '1.8-ga.4',
@@ -220,7 +220,7 @@ def __init__(
   ),
   '13': BranchVersions(
     gcc = '13.4.0',
-    rev = '5.1',
+    rev = '6',
 
     # trace back: 2023-12-22
     binutils = '2.41',