depends: fix "unexpected operator" error during "make download"

depends/Makefile

@@ -147,9 +147,9 @@ endef
 
 define check_or_remove_sources
   mkdir -p $($(package)_source_dir); cd $($(package)_source_dir); \
-  $(build_SHA256SUM) -c $($(package)_fetched) >/dev/null 2>/dev/null || \
-    ( if test -f $($(package)_all_sources); then echo "Checksum missing or mismatched for $(package) source. Forcing re-download."; fi; \
-      rm -f $($(package)_all_sources) $($(1)_fetched))
+  test -f $($(package)_fetched) && ( $(build_SHA256SUM) -c $($(package)_fetched) >/dev/null 2>/dev/null || \
+    ( echo "Checksum missing or mismatched for $(package) source. Forcing re-download."; \
+      rm -f $($(package)_all_sources) $($(1)_fetched))) || true
 endef
 
 check-packages: