cmake: update outdated CPack version info

Left over from r116516.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149751 91177308-0d34-0410-b5e6-96231b3b80d8

CMakeLists.txt

@@ -411,8 +411,8 @@ install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/include/
 # TODO: make and install documentation.
 
 set(CPACK_PACKAGE_VENDOR "LLVM")
-set(CPACK_PACKAGE_VERSION_MAJOR 2)
-set(CPACK_PACKAGE_VERSION_MINOR 9)
+set(CPACK_PACKAGE_VERSION_MAJOR 3)
+set(CPACK_PACKAGE_VERSION_MINOR 1)
 add_version_info_from_vcs(CPACK_PACKAGE_VERSION_PATCH)
 include(CPack)