modify rm flag

Author: belericant

src/common/m_compile_specific.f90

@@ -43,7 +43,7 @@ subroutine s_delete_directory(dir_name)
 #ifdef _WIN32
         call system('rmdir "'//dir_name//'" /s /q')
 #else
-        call system('rm -rf "'//dir_name//'"')
+        call system('rm -r "'//dir_name//'"')
 #endif
 
     end subroutine s_delete_directory