removed -mavx2 from CMakelists.txt for non AVX2 targets

cmake_targets/CMakeLists.txt

@@ -138,7 +138,7 @@ else (CMAKE_SYSTEM_PROCESSOR STREQUAL "armv7l")
       set(C_FLAGS_PROCESSOR "${C_FLAGS_PROCESSOR} -mavx2")
     endif()
     if (CPUINFO MATCHES "sse4_1")
-      set(C_FLAGS_PROCESSOR "${C_FLAGS_PROCESSOR} -msse4.1 -mavx2")
+      set(C_FLAGS_PROCESSOR "${C_FLAGS_PROCESSOR} -msse4.1")
     endif()
     if (CPUINFO MATCHES "ssse3")
       set(C_FLAGS_PROCESSOR "${C_FLAGS_PROCESSOR} -mssse3")