git: update to 3.36.0 & rebase patches & use CYGWIN_CHOST

Removes git-1.9.0-manifest-msys2.patch as it is already applied upstream
as fe90397604f9f9695b3fa0b8b11d9f93533b655f

Signed-off-by: Christopher Degawa <ccom@randomderp.com>

git/git-2.35.1-git-gui.patch

@@ -1,6 +1,6 @@
---- git-2.35.1/git-gui/git-gui.sh.orig	2022-01-29 01:48:42.000000000 +0100
-+++ git-2.35.1/git-gui/git-gui.sh	2022-03-12 18:51:13.610007600 +0100
-@@ -51,7 +51,10 @@
+--- a/git-gui/git-gui.sh
++++ b/git-gui/git-gui.sh
+@@ -51,7 +51,10 @@ catch {rename send {}} ; # What an evil concept...
  if { [info exists ::env(GIT_GUI_LIB_DIR) ] } {
  	set oguilib $::env(GIT_GUI_LIB_DIR)
  } else {
@@ -12,7 +12,7 @@
  }
  set oguirel {@@GITGUI_RELATIVE@@}
  if {$oguirel eq {1}} {
-@@ -274,10 +277,6 @@
+@@ -274,10 +277,6 @@ proc is_Cygwin {} {
  				set _iscygwin 0
  			} else {
  				set _iscygwin 1