Merged fse_static into fse.h . Now requires FSE_STATIC_LINKING_ONLY macro.

lib/decompress/zstd_decompress.c

@@ -58,7 +58,8 @@
 #include "mem.h"         /* low level memory routines */
 #define XXH_STATIC_LINKING_ONLY   /* XXH64_state_t */
 #include "xxhash.h"      /* XXH64_* */
-#include "fse_static.h"
+#define FSE_STATIC_LINKING_ONLY
+#include "fse.h"
 #define HUF_STATIC_LINKING_ONLY
 #include "huf.h"
 #include "zstd_internal.h"