Link with "msvcr[n]" available on the system, instead of a specific hardcoded dependency

Author: oana.stanoi

BackwardConfig.cmake

@@ -216,7 +216,7 @@ if(WIN32)
 			set(CMAKE_EXE_LINKER_FLAGS "-Wl,--pdb= ")
 			add_compile_options(-gcodeview)
 		else()
-			set(MINGW_MSVCR_LIBRARY "msvcr90$<$<CONFIG:DEBUG>:d>" CACHE STRING "Mingw MSVC runtime import library")
+			find_library(MINGW_MSVCR_LIBRARY ucrtbase msvcr140 msvcr120 msvcr110 msvcr100 msvcr90 REQUIRED DOC "Mingw MSVC runtime import library")
 			list(APPEND _BACKWARD_LIBRARIES ${MINGW_MSVCR_LIBRARY})
 		endif()
 	endif()