Added tests to reveal problem with source code location for FS0988 warning

closes https://github.com/Microsoft/visualfsharp/pull/465
ref https://github.com/Microsoft/visualfsharp/issues/461

commit c129badb23e20de07bdb38ea16fa2fa32a31cdb1
Author: Yury Yaroshevich <mstyura@hotmail.com>
Date:   Thu May 21 22:34:51 2015 +0300

    https://github.com/Microsoft/visualfsharp/issues/461: Added tests to reveal problem with source code location for FS0988 warning

tests/fsharpqa/Source/EntryPoint/W_NoEntryPointInLastModuleInsideMultipleNamespace.fs

+// #Regression #NoMT #EntryPoint 
+// Empty program entry point warning
+// Lack of entry point produces warning with correct source location when compiled to *.exe
+// when multiple namespaces with multiple modules declared in source file 
+//<Expects id="FS0988" span="(22,24-22,24)" status="warning">Main module of program is empty\: nothing will happen when it is run</Expects>
+
+#light
+namespace MyNamespace1
+
+module MyModule1 =
+    let irrelevant = 10
+    
+module MyModule2 =
+    let irrelevant = 10
+    
+namespace MyNamespace2
+
+module MyModule3 =
+    let irrelevant = 10
+    
+module MyModule4 =
+    let irrelevant = 10
\ No newline at end of file

tests/fsharpqa/Source/EntryPoint/W_NoEntryPointModuleInNamespace.fs

+// #Regression #NoMT #EntryPoint 
+// Empty program entry point warning
+// Lack of entry point produces warning with correct source location when compiled to *.exe
+// when single module declared inside namespace
+//<Expects id="FS0988" span="(11,24-11,24)" status="warning">Main module of program is empty\: nothing will happen when it is run</Expects>
+
+#light
+namespace MyNamespace1
+
+module MyModule1 =
+    let irrelevant = 10
\ No newline at end of file

tests/fsharpqa/Source/EntryPoint/W_NoEntryPointMultipleModules.fs

+// #Regression #NoMT #EntryPoint 
+// Empty program entry point warning
+// Lack of entry point produces warning with correct source location when compiled to *.exe
+// when multiple modules declared without declaring namespace
+//<Expects id="FS0988" span="(13,24-13,24)" status="warning">Main module of program is empty\: nothing will happen when it is run</Expects>
+
+#light
+
+module MyModule1 =
+    let irrelevant = 10
+
+module MyModule2 =
+    let irrelevant = 10
\ No newline at end of file

tests/fsharpqa/Source/EntryPoint/W_NoEntryPointTypeInNamespace.fs

+// #Regression #NoMT #EntryPoint 
+// Empty program entry point warning
+// Lack of entry point produces warning with correct source location when compiled to *.exe
+// when source file declares type inside namespace
+//<Expects id="FS0988" span="(10,18-10,18)" status="warning">Main module of program is empty\: nothing will happen when it is run</Expects>
+
+#light
+namespace MyNamespace1
+
+type T = T of int
\ No newline at end of file

tests/fsharpqa/Source/EntryPoint/env.lst

@@ -16,4 +16,8 @@ NoMT	SOURCE=entrypointandFSI02.fsx FSIMODE=EXEC COMPILE_ONLY=1				# entrypointan
 
 	SOURCE=E_CompilingToALibrary01.fs SCFLAGS="--test:ErrorRanges --target:library"	# E_CompilingToALibrary01.fs
 	SOURCE=E_CompilingToAModule01.fs  SCFLAGS="--test:ErrorRanges --target:module"	# E_CompilingToAModule01.fs
-	SOURCE=EntryPointAndAssemblyCulture.fs								# EntryPointAndAssemblyCulture.fs
\ No newline at end of file
+	SOURCE=EntryPointAndAssemblyCulture.fs								# EntryPointAndAssemblyCulture.fs
+	SOURCE=W_NoEntryPointInLastModuleInsideMultipleNamespace.fs SCFLAGS="--test:ErrorRanges"	# W_NoEntryPointInLastModuleInsideMultipleNamespace.fs
+	SOURCE=W_NoEntryPointModuleInNamespace.fs SCFLAGS="--test:ErrorRanges"	# W_NoEntryPointModuleInNamespace.fs
+	SOURCE=W_NoEntryPointMultipleModules.fs SCFLAGS="--test:ErrorRanges"	# W_NoEntryPointMultipleModules.fs
+	SOURCE=W_NoEntryPointTypeInNamespace.fs SCFLAGS="--test:ErrorRanges"	# W_NoEntryPointTypeInNamespace.fs
\ No newline at end of file