GNUtoMS: Add search path for VS 2015 environment scripts

Modules/Platform/Windows-GNU.cmake

@@ -148,6 +148,7 @@ macro(__windows_compiler_gnu_abi lang)
       find_program(CMAKE_GNUtoMS_VCVARS NAMES vcvars32.bat
         DOC "Visual Studio vcvars32.bat"
         PATHS
+        "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\VisualStudio\\14.0\\Setup\\VC;ProductDir]/bin"
         "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\VisualStudio\\12.0\\Setup\\VC;ProductDir]/bin"
         "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\VisualStudio\\11.0\\Setup\\VC;ProductDir]/bin"
         "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\VisualStudio\\10.0\\Setup\\VC;ProductDir]/bin"
@@ -161,6 +162,7 @@ macro(__windows_compiler_gnu_abi lang)
       find_program(CMAKE_GNUtoMS_VCVARS NAMES vcvars64.bat vcvarsamd64.bat
         DOC "Visual Studio vcvarsamd64.bat"
         PATHS
+        "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\VisualStudio\\14.0\\Setup\\VC;ProductDir]/bin/amd64"
         "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\VisualStudio\\12.0\\Setup\\VC;ProductDir]/bin/amd64"
         "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\VisualStudio\\11.0\\Setup\\VC;ProductDir]/bin/amd64"
         "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\VisualStudio\\10.0\\Setup\\VC;ProductDir]/bin/amd64"