add test for issue #97 Extended Command Line LFN issue (spaces in LFN…

… make hard to parse CMDLINE env var, so add quotes if needed)

tests/tstcmdln.bat

@@ -0,0 +1,8 @@
+@ECHO OFF
+mkdir "a long dir" > NUL
+copy testenv.exe "a long dir\testenv.exe" > NUL
+"a long dir"\testenv aaaaaaaaa realllly long command line to create a env variable that can pass the long name to it oh yeah a really long command line still going.  Oh yeah is is at the end yet, nope, lets keep going untilout of characters. 
+ECHO CMDLINE should start with quoted "a long dir\testenv.exe"
+del "a long dir\testenv.exe" > NUL
+rmdir "a long dir" > NUL
+