[json-glib] Remove json-glib-install.props's on re-generation

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

commit bb4c0918c85d6f428b45486ca4402c89fd5d9ac3
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Wed Oct 19 19:42:37 2016 +0800

    Remove json-glib-install.props's on re-generation
    
    This ensures that the changes in the generated build/win32/vs10/json-glib-install.props
    is applied to the same file in build/win32/vs[11|12|14].

 build/win32/vs10/Makefile.am |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/build/win32/vs10/Makefile.am b/build/win32/vs10/Makefile.am
index e0465ec..1727dc6 100644
--- a/build/win32/vs10/Makefile.am
+++ b/build/win32/vs10/Makefile.am
@@ -6,6 +6,9 @@ GENERATED_ITEMS =       \
        json-glib-install.props
 
 json-glib-install.props: $(top_srcdir)/build/win32/vs10/json-glib-install.propsin json-glib.vs10.headers
+       -$(RM) $(top_builddir)/build/win32/vs11/json-glib-install.props
+       -$(RM) $(top_builddir)/build/win32/vs12/json-glib-install.props
+       -$(RM) $(top_builddir)/build/win32/vs14/json-glib-install.props
        $(CPP) -P - <$(top_srcdir)/build/win32/vs10/json-glib-install.propsin >$@
        rm json-glib.vs10.headers