Added LFS_BIGGEST for enabling all opt-in features

Like LFS_LITTLER, this is a simple alias for existing defines. In this
case it enables all opt-in features, which is useful for testing:

  LFS_BIGGEST => LFS_CKPROGS
                 LFS_CKFETCHES
                 LFS_CKPARITY
                 LFS_CKDATACKSUMS
                 LFS_GC

This lowers the risk of forgetting a feature when running tests, which
has already happend a couple times.

The name comes from the idea of adding other tiers of features (
LFS_LITTLER, LFS_LITTLERER, LFS_BIGGER, etc), but I'm not entirely sure
what these would all look like.

Author: geky

lfs_util.h

@@ -35,6 +35,15 @@
 #define LFS_NO_ASSERT
 #endif
 
+// LFS_BIGGEST enables all opt-in features
+#ifdef LFS_BIGGEST
+#define LFS_CKPROGS
+#define LFS_CKFETCHES
+#define LFS_CKPARITY
+#define LFS_CKDATACKSUMS
+#define LFS_GC
+#endif
+
 
 // System includes
 #include <stdint.h>