Use `$(CHDIR)` so works with symlink [ci skip]

defs/gmake.mk

@@ -384,7 +384,7 @@ yjit-static-lib-no:
 
 yjit-static-lib-dev:
 	$(ECHO) 'building Rust YJIT (dev mode)'
-	$(Q) cd $(top_srcdir)/yjit && \
+	$(Q)$(CHDIR) $(top_srcdir)/yjit && \
 	        CARGO_TARGET_DIR='$(CARGO_TARGET_DIR)' \
 	        CARGO_TERM_PROGRESS_WHEN='never' \
 	        $(CARGO) $(CARGO_VERBOSE) build $(CARGO_BUILD_ARGS)