Parts of the changes by Fabrice Popineau <fabrice.popineau@supelec.fr>.
lib-src/makefile.w32-in (LOCAL_FLAGS): Add $(EMACS_EXTRA_C_FLAGS).
lib-src/emacsclient.c (main) <environ>: Remove declaration, already
pulled in by unistd.h on Posix hosts and stdlib.h on MS-Windows.
nt/inc/stdint.h (uint32_t, uint64_t) [_WIN64]: New typedefs.
(UINT64_MAX) [_WIN64]: Fix definition.
(uintmax_t, intmax_t): Fix definitions.
nt/inc/inttypes.h (strtoumax, strtoimax) [!__MINGW32__]: Provide
correct definitions.
nt/config.nt (HAVE_DECL_STRTOLL): Define.
(va_copy) [_WIN64]: Provide a better definition.
src/s/ms-w32.h (utimbuf) [_MSC_VER]: Don't define.
(snprintf) [_MSC_VER]: Redirect to _snprintf.
(strtoll) [_MSC_VER]: Redirect to _strtoi64.
(malloc, free, realloc, calloc): Redirect to e_* only when
compiling Emacs.
src/lisp.h (GCTYPEBITS): Move before first use.
(ALIGN_GCTYPEBITS) [_MSC_VER]: Define.
(DECL_ALIGN) [_MSC_VER]: Use it, as MSVC doesn't like bit ops in
this macro definition.
(tzname): Redirect to _tzname for all values of _MSC_VER.
Fixes: debbugs:9960
8c9afb4694