Add Windows-specific test snapshots

Author: gaborcsardi

tests/testthat/_snaps/win/installed.md

@@ -0,0 +1,18 @@
+# parse_description
+
+    Code
+      parse_description(tempfile())
+    Condition
+      Error in `parse_description()`:
+      ! Cannot open file `<tempdir>/<tempfile>` (system error 2, The system cannot find the file specified.
+      ) @lib.c:111 (pkgcache__read_file_raw) @lib.c:300 (pkgcache_parse_description)
+
+# parse_packages, errors
+
+    Code
+      parse_packages(tempfile(), type = "uncompressed")
+    Condition
+      Error in `parse_packages()`:
+      ! Cannot open file `<tempdir>/<tempfile>` (system error 2, The system cannot find the file specified.
+      ) @lib.c:111 (pkgcache__read_file_raw)
+