tools/squashfs4: add new tool for squashfs4 images

squashfs tool is finally reborn and correctly maintained.

Introduce the new version as a replacement for squasfs4kit as it was a
fork and also abandoned.

Add additional patch to add the missing feature present in squashfskit4
but still missing on this new project.

Backport each required patch that fix compilation error on macos.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

tools/Makefile

@@ -59,7 +59,7 @@ tools-y += patch-image
 tools-y += patchelf
 tools-y += pkgconf
 tools-y += quilt
-tools-y += squashfskit4
+tools-y += squashfs4
 tools-y += sstrip
 tools-y += zip
 tools-y += zlib
@@ -117,11 +117,11 @@ $(curdir)/pkgconf/compile := $(curdir)/meson/compile
 $(curdir)/quilt/compile := $(curdir)/autoconf/compile $(curdir)/findutils/compile
 $(curdir)/sdcc/compile := $(curdir)/bison/compile
 $(curdir)/squashfs3-lzma/compile := $(curdir)/lzma-old/compile
-$(curdir)/squashfskit4/compile := $(curdir)/xz/compile $(curdir)/zlib/compile
+$(curdir)/squashfs4/compile := $(curdir)/xz/compile $(curdir)/zlib/compile
 $(curdir)/zstd/compile := $(curdir)/meson/compile
 
 ifneq ($(HOST_OS),Linux)
-  $(curdir)/squashfskit4/compile += $(curdir)/coreutils/compile
+  $(curdir)/squashfs4/compile += $(curdir)/coreutils/compile
   tools-y += coreutils
 endif
 ifeq ($(HOST_OS),Darwin)