add multiple_inheritance example from Salvaire. It's working

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@6577 626c5289-ae23-0410-ae9c-e8d60b6d4f22

SWIG/Examples/perl5/multiple_inheritance/Makefile

@@ -0,0 +1,19 @@
+TOP        = ../..
+SWIG       = $(TOP)/../swig
+CXXSRCS    = 
+TARGET     = example
+INTERFACE  = example.i
+LIBS       = 
+
+all::
+	$(MAKE) -f $(TOP)/Makefile CXXSRCS='$(CXXSRCS)' SWIG='$(SWIG)' \
+	TARGET='$(TARGET)' INTERFACE='$(INTERFACE)' perl5_cpp
+
+static::
+	$(MAKE) -f $(TOP)/Makefile CXXSRCS='$(CXXSRCS)' SWIG='$(SWIG)' \
+	TARGET='myperl' INTERFACE='$(INTERFACE)' perl5_cpp_static
+
+clean::
+	$(MAKE) -f $(TOP)/Makefile perl5_clean
+
+check: all