[atkmm] NMake Makefiles: Use 'md', not 'mkdir'

[Chun-wei Fan <fanchunwei src gnome org>]

commit a6a1561e7c3092e139990ff7b64dd748782a9fb6
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Wed Apr 1 16:08:42 2020 +0800

    NMake Makefiles: Use 'md', not 'mkdir'
    
    This avoids confusion with the unixy ones supplied by Cygwin or MSYS64,
    since we could be using tools from there to enable building from GIT
    checkouts.

 MSVC_NMake/install.mak | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/MSVC_NMake/install.mak b/MSVC_NMake/install.mak
index 011816e..0e55844 100644
--- a/MSVC_NMake/install.mak
+++ b/MSVC_NMake/install.mak
@@ -2,9 +2,9 @@
 # a path under $(PREFIX).
 
 install: all
-       @if not exist $(PREFIX)\bin\ mkdir $(PREFIX)\bin
-       @if not exist $(PREFIX)\lib\atkmm-$(ATKMM_MAJOR_VERSION).$(ATKMM_MINOR_VERSION)\include\ mkdir 
$(PREFIX)\lib\atkmm-$(ATKMM_MAJOR_VERSION).$(ATKMM_MINOR_VERSION)\include
-       @if not exist $(PREFIX)\include\atkmm-$(ATKMM_MAJOR_VERSION).$(ATKMM_MINOR_VERSION)\atkmm\private\ 
@mkdir $(PREFIX)\include\atkmm-$(ATKMM_MAJOR_VERSION).$(ATKMM_MINOR_VERSION)\atkmm\private
+       @if not exist $(PREFIX)\bin\ md $(PREFIX)\bin
+       @if not exist $(PREFIX)\lib\atkmm-$(ATKMM_MAJOR_VERSION).$(ATKMM_MINOR_VERSION)\include\ md 
$(PREFIX)\lib\atkmm-$(ATKMM_MAJOR_VERSION).$(ATKMM_MINOR_VERSION)\include
+       @if not exist $(PREFIX)\include\atkmm-$(ATKMM_MAJOR_VERSION).$(ATKMM_MINOR_VERSION)\atkmm\private\ 
@md $(PREFIX)\include\atkmm-$(ATKMM_MAJOR_VERSION).$(ATKMM_MINOR_VERSION)\atkmm\private
        @if not exist $(PREFIX)\share\atkmm-$(ATKMM_MAJOR_VERSION).$(ATKMM_MINOR_VERSION)\proc\ md 
$(PREFIX)\share\atkmm-$(ATKMM_MAJOR_VERSION).$(ATKMM_MINOR_VERSION)\proc
        @copy /b vs$(VSVER)\$(CFG)\$(PLAT)\$(ATKMM_LIBNAME).dll $(PREFIX)\bin
        @copy /b vs$(VSVER)\$(CFG)\$(PLAT)\$(ATKMM_LIBNAME).pdb $(PREFIX)\bin