[Bug 255308] shells/ast-ksh: fix build on powerpc64*

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=255308

--- Comment #3 from commit-hook at FreeBSD.org ---
A commit in branch main references this bug:

URL:
https://cgit.FreeBSD.org/ports/commit/?id=27ff8d373e4d1ed2e6a049015109d23171e4bc1d

commit 27ff8d373e4d1ed2e6a049015109d23171e4bc1d
Author:     Piotr Kubaj <pkubaj at FreeBSD.org>
AuthorDate: 2021-04-26 15:24:28 +0000
Commit:     Piotr Kubaj <pkubaj at FreeBSD.org>
CommitDate: 2021-04-26 15:24:28 +0000

    shells/ast-ksh: fix build on powerpc64*

    Bring back patches committed as part of r346423 to fix build issue:
   
/wrkdirs/usr/ports/shells/ast-ksh/work/ast-ksh93v/src/lib/libast/hash/hashalloc.c:162:4:
error: non-const lvalue reference to type '__builtin_va_list' cannot bind to a
temporary of type 'va_list' (aka 'char *')
                            va_copy(ap, va_listval(va_arg(ap, va_listarg)));
                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    /usr/include/sys/_stdarg.h:49:32: note: expanded from macro 'va_copy'
        #define     va_copy(dest, src)      __va_copy(dest, src)
                                            ^~~~~~~~~~~~~~~~~~~~
    /usr/include/sys/_stdarg.h:47:58: note: expanded from macro '__va_copy'
      #define       __va_copy(dest, src)    __builtin_va_copy((dest), (src))
                                                                      ^~~~~
    1 error generated.

    PR:     255308
    Approved by:    saper at saper.info (maintainer)

 .../patch-src_lib_libast_hash_hashalloc.c (new)      | 20 ++++++++++++++++++++
 .../patch-src_lib_libast_string_tokscan.c (new)      | 20 ++++++++++++++++++++
 2 files changed, 40 insertions(+)

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