Cleanup version symbol macros and attributes/declspecs

1) Get rid of xaliasify, xexpand and xversionify for KMP_EXPAND_NAME and
KMP_VERSION_SYMBOL. KMP_VERSION_SYMBOL is a combination of xaliasify and
xversionify.

2) Put all attribute and __declspec definitions in kmp_os.h

Differential Revision: https://reviews.llvm.org/D39516


git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@317636 91177308-0d34-0410-b5e6-96231b3b80d8

runtime/src/z_Linux_util.cpp

@@ -508,7 +508,7 @@ static void *__kmp_launch_worker(void *thr) {
   __kmp_gtid = gtid;
 #endif
 #if KMP_STATS_ENABLED
-  // set __thread local index to point to thread-specific stats
+  // set thread local index to point to thread-specific stats
   __kmp_stats_thread_ptr = ((kmp_info_t *)thr)->th.th_stats;
   KMP_START_EXPLICIT_TIMER(OMP_worker_thread_life);
   KMP_SET_THREAD_STATE(IDLE);
@@ -778,7 +778,7 @@ void __kmp_create_worker(int gtid, kmp_info_t *th, size_t stack_size) {
 
   // th->th.th_stats is used to transfer thread-specific stats-pointer to
   // __kmp_launch_worker. So when thread is created (goes into
-  // __kmp_launch_worker) it will set its __thread local pointer to
+  // __kmp_launch_worker) it will set its thread local pointer to
   // th->th.th_stats
   if (!KMP_UBER_GTID(gtid)) {
     th->th.th_stats = __kmp_stats_list->push_back(gtid);