Partially revert an upstream commit to avoid build breakage
on Ubuntu.

Refrerence to discussion starting at
https://github.com/openwrt/packages/pull/16726#issuecomment-927309052

Upstream commit:
  ae9ac2a1bf
  meson: fix cross-compilation issues with gperf header file preprocessing

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>

Remove upstreamed patches.

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

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

Faster compilation.

Backport upstream patch fixing cross compilation.

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

Fixes compilation with glibc.

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

Signed-off-by: Jan Pavlinec <jan.pavlinec@nic.cz>

Fixed a typo in tcpreplay.

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>

fix Makefile chmod (644)
replace MD5SUM with HASH
add PKG_MIRROR_HASH when PKG_SOURCE_PROTO:=git

(PKG_SOURCE_PROTO:=svn tarballs are not reproducible for now)

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>