internal/rosa/llvm: arch-specific patches

Broken aarch64 tests in LLVM seem unlikely to be fixed soon.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/llvm.go

@@ -316,7 +316,7 @@ ln -s clang++ /work/system/bin/c++
 ninja check-all
 `,
 
-		patches: [][2]string{
+		patches: slices.Concat([][2]string{
 			{"add-rosa-vendor", `diff --git a/llvm/include/llvm/TargetParser/Triple.h b/llvm/include/llvm/TargetParser/Triple.h
 index 9c83abeeb3b1..5acfe5836a23 100644
 --- a/llvm/include/llvm/TargetParser/Triple.h
@@ -488,7 +488,7 @@ index 64324a3f8b01..15ce70b68217 100644
                                     "/System/Library/Frameworks"};
  
 `},
-		},
+		}, clangPatches),
 	})
 
 	return

internal/rosa/llvm_amd64.go

@@ -0,0 +1,4 @@
+package rosa
+
+// clangPatches are patches applied to the LLVM source tree for building clang.
+var clangPatches [][2]string

internal/rosa/llvm_arm64.go

@@ -0,0 +1,4 @@
+package rosa
+
+// clangPatches are patches applied to the LLVM source tree for building clang.
+var clangPatches [][2]string