[tsan] Fix some tiny errors.

[yabinc]

Summary

1. Fix spell error for sigaction.
2. Make line_length <= 80.

lib/tsan/rtl/tsan_interceptors.cc

 typedef void (*sighandler_t)(int sig);
 typedef void (*sigactionhandler_t)(int sig, my_siginfo_t *siginfo, void *uctx);
 
 #if SANITIZER_ANDROID
 struct sigaction_t {
   u32 sa_flags;
   union {
     sighandler_t sa_handler;
-    sigactionhandler_t sa_sgiaction;
+    sigactionhandler_t sa_sigaction;
   };
   __sanitizer_sigset_t sa_mask;
   void (*sa_restorer)();
 };
 #else
 struct sigaction_t {
 #ifdef __mips__
   u32 sa_flags;

lib/tsan/rtl/tsan_platform_linux.cc

 #ifndef SANITIZER_GO
 void ReplaceSystemMalloc() { }
 #endif
 
 #ifndef SANITIZER_GO
 #if SANITIZER_ANDROID
 
 #if defined(__aarch64__)
-# define __get_tls() ({ void** __val; __asm__("mrs %0, tpidr_el0" : "=r"(__val)); __val; })
+# define __get_tls() \
+    ({ void** __val; __asm__("mrs %0, tpidr_el0" : "=r"(__val)); __val; })
 #elif defined(__x86_64__)
-# define __get_tls() ({ void** __val; __asm__("mov %%fs:0, %0" : "=r"(__val)); __val; })
+# define __get_tls() \
+    ({ void** __val; __asm__("mov %%fs:0, %0" : "=r"(__val)); __val; })
 #else
 #error unsupported architecture
 #endif
 
 // On Android, __thread is not supported. So we store the pointer to ThreadState
 // in TLS_SLOT_TSAN, which is the tls slot allocated by Android bionic for tsan.
 static const int TLS_SLOT_TSAN = 8;
-// On Android, one thread can call intercepted functions after DestroyThreadState(),
-// so add a fake thread state for "dead" threads.
+// On Android, one thread can call intercepted functions after
+// DestroyThreadState(), so add a fake thread state for "dead" threads.
 static ThreadState *dead_thread_state = nullptr;
 
 ThreadState *cur_thread() {
   ThreadState* thr = (ThreadState*)__get_tls()[TLS_SLOT_TSAN];
   if (thr == nullptr) {
     __sanitizer_sigset_t emptyset;
     internal_sigfillset(&emptyset);
     __sanitizer_sigset_t oldset;