add find make program for 71

Modules/CMakeVS71FindMake.cmake

@@ -0,0 +1,9 @@
+FIND_PROGRAM(CMAKE_MAKE_PROGRAM
+        NAMES devenv
+        PATHS
+        [HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\VisualStudio\\7.1\\Setup\\VS;EnvironmentDirectory]
+        "c:/Program Files/Microsoft Visual Studio .NET/Common7/IDE"
+        "c:/Program Files/Microsoft Visual Studio.NET/Common7/IDE"
+        "/Program Files/Microsoft Visual Studio .NET/Common7/IDE/"
+)
+MARK_AS_ADVANCED(CMAKE_MAKE_PROGRAM)