headers: configure: Add more msvcrt versions into --with-default-msvcrt list

Import libraries for all these msvcrt versions are already as part of build process.

Signed-off-by: LIU Hao <lh_mouse@126.com>
diff --git a/mingw-w64-headers/configure.ac b/mingw-w64-headers/configure.ac
index 1307538..d82280c 100644
--- a/mingw-w64-headers/configure.ac
+++ b/mingw-w64-headers/configure.ac
@@ -148,6 +148,21 @@
   [],
   [with_default_msvcrt=msvcrt])
 case $with_default_msvcrt in
+msvcrt10*)
+  default_msvcrt_version=0x100
+  ;;
+msvcrt20*)
+  default_msvcrt_version=0x200
+  ;;
+msvcrt40*)
+  default_msvcrt_version=0x400
+  ;;
+msvcr70*)
+  default_msvcrt_version=0x700
+  ;;
+msvcr71*)
+  default_msvcrt_version=0x701
+  ;;
 msvcr80*)
   default_msvcrt_version=0x800
   ;;