liblz4: add patch removing distutils requirement

Allows meson to compile on systems that lack distutils.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

libs/liblz4/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=liblz4
 PKG_VERSION:=1.9.2
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://codeload.github.com/lz4/lz4/tar.gz/v$(PKG_VERSION)?

libs/liblz4/patches/020-distutils.patch

@@ -0,0 +1,13 @@
+--- a/contrib/meson/meson.build
++++ b/contrib/meson/meson.build
+@@ -35,8 +35,8 @@ compiler_msvc = 'msvc'
+ lz4_version = meson.project_version()
+ 
+ lz4_h_file = join_paths(meson.current_source_dir(), '../../lib/lz4.h')
+-GetLz4LibraryVersion_py = files('GetLz4LibraryVersion.py')
+-r = run_command(python3, GetLz4LibraryVersion_py, lz4_h_file)
++GetLz4LibraryVersion_py = find_program('GetLz4LibraryVersion.py', native : true)
++r = run_command(GetLz4LibraryVersion_py, lz4_h_file)
+ if r.returncode() == 0
+   lz4_version = r.stdout().strip()
+   message('Project version is now: @0@'.format(lz4_version))