cmake: move global project definition to beginning

such that necessary cmake variables to detect Cygwin are defined
when setting the C++ standard and we can distinguish.

CMakeLists.txt

 cmake_minimum_required(VERSION 2.8.8)
 
+project(googletest-distribution)
+set(GOOGLETEST_VERSION 1.9.0)
+
 if (CMAKE_VERSION VERSION_LESS "3.1")
   add_definitions(-std=c++11)
 else()
@@ -12,9 +15,6 @@ if (POLICY CMP0048)
   cmake_policy(SET CMP0048 NEW)
 endif (POLICY CMP0048)
 
-project(googletest-distribution)
-set(GOOGLETEST_VERSION 1.9.0)
-
 enable_testing()
 
 include(CMakeDependentOption)