[gcc r13-4888] libgcc: fix gfortran build on Windows

[Jonathan Yong <jyong@gcc.gnu.org>]

https://gcc.gnu.org/g:339db340af2fdeceeb06b2249330bc103e38691c

commit r13-4888-g339db340af2fdeceeb06b2249330bc103e38691c
Author: Jonathan Yong <10walls@gmail.com>
Date:   Sun Dec 25 01:06:20 2022 +0000

    libgcc: fix gfortran build on Windows
    
    Broken by 9149a5b7e0a66b7b94d5b7db3194a975d18dea2f.
    CC_NONE is defined by wingdi.h and conflicting with gcc.
    Committed as obvious.
    
    libgcc/:
    
            * config/i386/gthr-win32.h: undef CC_NONE
    
    Signed-off-by: Jonathan Yong <10walls@gmail.com>

Diff:
---
 libgcc/config/i386/gthr-win32.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libgcc/config/i386/gthr-win32.h b/libgcc/config/i386/gthr-win32.h
index 9485dd50bf9..146357fa436 100644
--- a/libgcc/config/i386/gthr-win32.h
+++ b/libgcc/config/i386/gthr-win32.h
@@ -93,8 +93,9 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #endif
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
-/* Now undef the windows BOOL.  */
+/* Now undef the windows BOOL and CC_NONE */
 #undef BOOL
+#undef CC_NONE
 
 /* Key structure for maintaining thread specific storage */
 static DWORD __gthread_objc_data_tls = TLS_OUT_OF_INDEXES;
@@ -604,6 +605,7 @@ __gthread_cond_timedwait (__gthread_cond_t *__cond, __gthread_mutex_t *__mutex,
 
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
+#undef CC_NONE
 
 __GTHREAD_WIN32_INLINE int
 __gthread_detach (__gthread_t __thr)