[gobject-introspection] build/win32/vs10/Makefile.am: Delete gi-install.props's on re-generation

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

commit 157043f5e304652695d0596c32d138031bbf8fb7
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Wed Oct 26 12:07:13 2016 +0800

    build/win32/vs10/Makefile.am: Delete gi-install.props's on re-generation
    
    This is to ensure that the chamges that is applied to gi-install.props here is
    applied to the project files in build/win32/vs[11|12|14] as well.

 build/win32/vs10/Makefile.am |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/build/win32/vs10/Makefile.am b/build/win32/vs10/Makefile.am
index 95f6e13..bc84125 100644
--- a/build/win32/vs10/Makefile.am
+++ b/build/win32/vs10/Makefile.am
@@ -35,8 +35,11 @@ EXTRA_DIST = \
        $(GENERATED_ITEMS)
 
 gi-install.props: $(top_srcdir)/build/win32/vs10/gi-install.propsin girepository.vs10.headers 
giscanner.vs10.scripts
+       -$(RM) $(top_builddir)/build/win32/vs11/gi-install.props
+       -$(RM) $(top_builddir)/build/win32/vs12/gi-install.props
+       -$(RM) $(top_builddir)/build/win32/vs14/gi-install.props
        $(CPP) -P - <$(top_srcdir)/build/win32/vs10/gi-install.propsin >$@
-       rm girepository.vs10.headers
-       rm giscanner.vs10.scripts
+       $(RM) girepository.vs10.headers
+       $(RM) giscanner.vs10.scripts
 
 DISTCLEANFILES = $(GENERATED_ITEMS)