Configure ELAST for MinGW

Summary:
Use _LIBCPP_MSVCRT_LIKE while configuring ELAST, so MinGW gets the same
configuration as MSVC.

Reviewers: compnerd, srhines, danalbert, mstorsjo

Subscribers: christof, ldionne, cfe-commits

Differential Revision: https://reviews.llvm.org/D48731

llvm-svn: 335916

Author: pirama-arumuga-nainar

libcxx/src/include/config_elast.h

@@ -12,7 +12,7 @@
 
 #include <__config>
 
-#if defined(_LIBCPP_MSVCRT)
+#if defined(_LIBCPP_MSVCRT_LIKE)
 #include <stdlib.h>
 #else
 #include <errno.h>
@@ -30,7 +30,7 @@
 // No _LIBCPP_ELAST needed on Apple
 #elif defined(__sun__)
 #define _LIBCPP_ELAST ESTALE
-#elif defined(_LIBCPP_MSVCRT)
+#elif defined(_LIBCPP_MSVCRT_LIKE)
 #define _LIBCPP_ELAST (_sys_nerr - 1)
 #else
 // Warn here so that the person doing the libcxx port has an easier time: