Pin aws-lc-fips-sys to version 0.12.14

The bug seems to have been fixed with version 0.12.15:
aws/aws-lc-rs@c236deb

Author: smoelius

tests/third_party/aws-lc-fips-sys.txt

@@ -1,3 +1,6 @@
 # smoelius: https://github.com/rust-lang/docs.rs/issues/2513#issuecomment-2132648674
 
-0.12
+# smoelius: Pinning to version 0.12.14 as the bug seems to have been fixed with version 0.12.15:
+# https://github.com/aws/aws-lc-rs/commit/c236deb20dc969bc1fcfe3458aa6031790efcec9
+
+0.12.14