Fix LTO-related breakage when old LLVMs are installed

Author: graydon

Cargo.toml

@@ -15,7 +15,7 @@ debug = true
 
 [profile.fastdev]
 inherits = "release"
-lto = false
+lto = "off"
 debug = "line-tables-only"
 codegen-units = 16
 split-debuginfo = "unpacked"

src/Makefile.am

@@ -343,7 +343,6 @@ $(LIBRUST_STELLAR_CORE): $(RUST_HOST_DEPFILES) $(SRC_RUST_FILES) Makefile $(RUST
 		--locked \
 		--target-dir $(abspath $(RUST_TARGET_DIR)) \
 		$(CARGO_FEATURE_FASTDEV) $(CARGO_FEATURE_TRACY) $(CARGO_FEATURE_NEXT) $(CARGO_FEATURE_TESTUTILS)
-	ranlib $@
 
 else # !ENABLE_FASTDEV_UNSAFE_FOR_PRODUCTION