[LyX/master] Cmake build: Correct wrong comment

[Kornel Benko]

commit 48bad4b5818fdd93c29753e4f6c2c1ff087eabcd
Author: Kornel Benko <kor...@lyx.org>
Date:   Sat Jun 11 12:44:15 2016 +0200

    Cmake build: Correct wrong comment

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1bc690a..1a52acc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -262,9 +262,8 @@ set(LYX_GCC11_MODE)
 if(UNIX OR MINGW)
        if (CMAKE_CXX_COMPILER_ID MATCHES "^[cC]lang$")
          # ignore the GCC_VERSION for clang
-         # We pretend the compiler version >= 4.9
+         # and use the resulting CXX11_STD_REGEX found in 
FindCXX11Compiler.cmake
          message(STATUS "Using clang")
-         # CXX11_STD_REGEX found in FindCXX11Compiler.cmake
          if(CXX11_STD_REGEX)
            set(LYX_USE_STD_REGEX 1)
          else()