force ci-llvm by default on library and tools profiles

It's very rare for developers to need to modify LLVM,
so "if-unchanged" isn't a good default since it fetches
the LLVM submodule to track changes.

Signed-off-by: onur-ozkan <[email protected]>

Author: onur-ozkan

src/bootstrap/defaults/config.library.toml

@@ -13,4 +13,5 @@ lto = "off"
 
 [llvm]
 # Will download LLVM from CI if available on your platform.
-download-ci-llvm = "if-unchanged"
+# If you intend to modify `src/llvm-project`, use `"if-unchanged"` or `false` instead.
+download-ci-llvm = true

src/bootstrap/defaults/config.tools.toml

@@ -17,4 +17,5 @@ compiler-docs = true
 
 [llvm]
 # Will download LLVM from CI if available on your platform.
-download-ci-llvm = "if-unchanged"
+# If you intend to modify `src/llvm-project`, use `"if-unchanged"` or `false` instead.
+download-ci-llvm = true