[cmake] Fix typo in test/asan/CMakeLists.txt

[azharudd]

Summary

[cmake] Fix typo in test/asan/CMakeLists.txt

Should be variable name instead of variable reference.

[smeenai]

The two should be equivalent unless CMAKE_SYSTEM_VERSION expands out to a value that's a variable name (which is unlikely, since it should be expanding out to a number), but this is cleaner and more consistent.

[azharudd]

In D41214#966392, @smeenai wrote:

The two should be equivalent unless CMAKE_SYSTEM_VERSION expands out to a value that's a variable name (which is unlikely, since it should be expanding out to a number), but this is cleaner and more consistent.

Also, if the variable is unset, it messes up the if condition expression and causes a CMake error.

[azharudd]

Thanks for the review @smeenai .

test/asan/CMakeLists.txt

 set(ASAN_LIT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
 
 set(ASAN_TESTSUITES)
 set(ASAN_DYNAMIC_TESTSUITES)
 
 # Before Windows 8 (CMAKE_SYSTEM_VERSION 6.2), reserving large regions of shadow
 # memory allocated physical memory for page tables, which made it very
 # unreliable. Remove the asan tests from check-all in this configuration.
 set(SHADOW_MAPPING_UNRELIABLE FALSE)
 if(OS_NAME MATCHES "Windows" AND CMAKE_SIZEOF_VOID_P EQUAL 8 AND
-    ${CMAKE_SYSTEM_VERSION} LESS 6.2)
+    CMAKE_SYSTEM_VERSION LESS 6.2)
   set(SHADOW_MAPPING_UNRELIABLE TRUE)
   message(WARNING "Disabling ASan tests because they are unreliable on Windows 7 and earlier")
 endif()
 
 if (SHADOW_MAPPING_UNRELIABLE)
   set(EXCLUDE_FROM_ALL TRUE)
 endif()