set _WIN32_WINNT version to 0x0600 in gdb

https://sourceware.org/bugzilla/show_bug.cgi?id=29966
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108225

Author: AldanTanneo

specs/gdb.anod

@@ -96,6 +96,7 @@ class GDB(spec("common")):
 
         if self.env.host.os.name == "windows":
             configure.add("CFLAGS=-std=gnu17") # fix for new defaults in gcc 15.1.0
+            configure.add("CXXFLAGS=-D_WIN32_WINNT=0x0600") # set min windows version
             configure.add("--disable-tui")
             configure.add(
                 "--with-libiconv-prefix=%s"

specs/patches/gdb-0002-Fix-using-gnu-print.patch

@@ -83,8 +83,7 @@ index 72c1c5144f3..ccf440baf0c 100644
 -#  define _WIN32_WINNT 0x0501
 +#  define _WIN32_WINNT 0x0600
  # endif
- #endif /* __MINGW32__ || __CYGWIN__ */
-
+ #endif	/* __MINGW32__ || __CYGWIN__ */
 diff --git a/gdbsupport/common.m4 b/gdbsupport/common.m4
 index 3909ec81ccb..118dba78815 100644
 --- gdbsupport/common.m4
@@ -103,7 +102,7 @@ index 3909ec81ccb..118dba78815 100644
 -    #  define _WIN32_WINNT 0x0501
 +    #  define _WIN32_WINNT 0x0600
      # endif
-     #endif     /* __MINGW32__ || __CYGWIN__ */
+     #endif	/* __MINGW32__ || __CYGWIN__ */
      #include <thread>