Add patch headers

Also cleanup the flex patch a bit

sysa/bash-2.05b/patches/dev-tty.patch

@@ -1,3 +1,7 @@
+We do not have /dev at this stage of the bootstrap, including /dev/tty. For
+some reason, bash has a fixation on /dev/tty, even though we are not
+interactive. Removing this check entirely fixes this issue.
+
 diff --color -ru shell.c
 --- shell.c	2002-07-02 01:27:11.000000000 +1000
 +++ shell.c	2021-01-16 11:23:36.407287955 +1100

sysa/bash-2.05b/patches/extern.patch

@@ -1,4 +1,6 @@
---- builtins/common.c.bak	2021-01-15 21:32:56.938683418 +1100
+tinycc's extern support is bad. i.e. these externs don't propagate through.
+
+--- builtins/common.c	2021-01-15 21:32:56.938683418 +1100
 +++ builtins/common.c	2021-01-15 21:34:09.102153806 +1100
 @@ -46,6 +46,9 @@
  #include "../flags.h"

sysa/bash-2.05b/patches/locale.patch

@@ -1,3 +1,5 @@
+mes libc + setting locale = not worky.
+
 --- locale.c	2021-01-15 09:38:55.729307629 +1100
 +++ locale.c	2021-01-15 11:19:01.929391346 +1100
 @@ -190,7 +190,7 @@

sysa/bash-2.05b/patches/mes-libc.patch

@@ -1,3 +1,5 @@
+mes libc does not have locale support...
+
 diff --git lib/sh/snprintf.c lib/sh/snprintf.c
 index 7669576..747aeba 100644
 --- lib/sh/snprintf.c

sysa/bash-2.05b/patches/missing-defines.patch

@@ -1,4 +1,8 @@
---- ../bash-2.05b.bak/execute_cmd.c	2021-01-15 09:38:55.730307635 +1100
+We don't actually want any of these things, which should really be hidden
+behind the ifdefs given here to disable them when they are not being
+used (as we do).
+
+--- execute_cmd.c	2021-01-15 09:38:55.730307635 +1100
 +++ execute_cmd.c	2021-01-15 09:43:41.046896754 +1100
 @@ -286,12 +286,18 @@
      {

sysa/bash-2.05b/patches/tinycc.patch

@@ -1,3 +1,6 @@
+int name, namelen; is wrong for mes libc, it is char* name, so we modify tinycc
+to reflect this.
+
 diff --git lib/sh/oslib.c lib/sh/oslib.c
 index 90d7be9..37fdf2a 100644
 --- lib/sh/oslib.c