[FL-2520] FW build with -Wextra (#1185)

* Fixing compiler warnings with -Wextra
* More warnings suppression, WIP
* Even more warning fixes
* Added new lines at end of text files.
* Padding fix
* Additional fixes to warnings on different build configurations; added -Wextra to default build pipeline
* Fixes for Secplus v1
* -additional warnings
* +-Wredundant-decls fixes
* FuriHal: print stack overflow task name in console
* FuriHal: add missing include

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>

lib/fnv1a-hash/fnv1a-hash.c

@@ -7,4 +7,4 @@ uint32_t fnv1a_buffer_hash(const uint8_t* buffer, uint32_t length, uint32_t hash
         hash = (hash ^ buffer[i]) * 16777619ULL;
     }
     return hash;
-}
+}

lib/fnv1a-hash/fnv1a-hash.h

@@ -36,4 +36,4 @@ inline uint32_t fnv1a_string_hash(const char* str) {
     }
     return hash;
 }
-#endif
+#endif