[gtksourceview] Remove gtksourceview-install.props's during re-generation

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

commit 5f3ab2ea2cace0e6a58af4503edb1ea627c74149
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Wed Oct 19 19:02:22 2016 +0800

    Remove gtksourceview-install.props's during re-generation
    
    This is to ensure the changes in the generated
    build/win32/vs10/gtksourceview-install.props are applied in
    build/win32/vs[11|12|14] as well.

 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 e0cec8d..93cc36d 100644
--- a/build/win32/vs10/Makefile.am
+++ b/build/win32/vs10/Makefile.am
@@ -19,6 +19,9 @@ EXTRA_DIST =                                  \
        $(GENERATED_ITEMS)
 
 gtksourceview-install.props: $(top_srcdir)/build/win32/vs10/gtksourceview-install.propsin 
$(MSVC10_HEADERS_LISTS)
+       -$(RM) $(top_builddir)/build/win32/vs11/gtksourceview-install.props
+       -$(RM) $(top_builddir)/build/win32/vs12/gtksourceview-install.props
+       -$(RM) $(top_builddir)/build/win32/vs14/gtksourceview-install.props
        $(CPP) -P - <$(top_srcdir)/build/win32/vs10/gtksourceview-install.propsin >$@
        $(RM) $(MSVC10_HEADERS_LISTS)