Cygwin: bump dll minor version to 3.6.7

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

Author: github-cygwin

winsup/cygwin/include/cygwin/version.h

@@ -11,7 +11,7 @@ details. */
    changes to the DLL and is mainly informative in nature. */
 
 #define CYGWIN_VERSION_DLL_MAJOR 3006
-#define CYGWIN_VERSION_DLL_MINOR 6
+#define CYGWIN_VERSION_DLL_MINOR 7
 
 /* CYGWIN_VERSION_DLL_COMBINED gives us a single number representing the
    combined DLL major and minor numbers. */