add -fprofile-update=atomic flag to coverage.

Author: MFraters

CMakeLists.txt

@@ -352,7 +352,7 @@ SET(FORCE_COLORED_OUTPUT ON CACHE BOOL "Forces colored output when compiling wit
 IF ( CMAKE_BUILD_TYPE STREQUAL Coverage )
   SET(CMAKE_VERBOSE_MAKEFILE on )
   SET(WB_COMPILER_OPTIONS_PRIVATE_COVERAGE_NEW --coverage -fprofile-arcs -ftest-coverage -g)
-  SET(WB_COMPILER_OPTIONS_PRIVATE_COVERAGE_OLD "--coverage -fprofile-arcs -ftest-coverage -g")
+  SET(WB_COMPILER_OPTIONS_PRIVATE_COVERAGE_OLD "--coverage -fprofile-arcs -ftest-coverage -g -fprofile-update=atomic")
 
   ## for old versions of cmake
   SET(WB_FORTRAN_COMPILER_FLAGS_COVERAGE "--coverage")