reduce warnings when compiling unit tests

svn path=/trunk/mcs/; revision=43109

mcs/class/System.ServiceProcess/Makefile

@@ -4,6 +4,7 @@ include ../../build/rules.make
 
 LIBRARY = System.ServiceProcess.dll
 LIB_MCS_FLAGS = /r:System.dll /r:System.Configuration.Install.dll
+TEST_MCS_FLAGS = $(LIB_MCS_FLAGS) -nowarn:0618 -nowarn:219 -nowarn:169
 
 EXTRA_DISTFILES =