threads: Enable __lock file for posix thread model (#337)

Author: loganek

Makefile

@@ -190,6 +190,7 @@ LIBC_TOP_HALF_MUSL_SOURCES = \
 ifeq ($(THREAD_MODEL), posix)
 LIBC_TOP_HALF_MUSL_SOURCES += \
     $(addprefix $(LIBC_TOP_HALF_MUSL_SRC_DIR)/, \
+        thread/__lock.c \
         thread/__wait.c \
         thread/__timedwait.c \
         thread/pthread_cleanup_push.c \

expected/wasm32-wasi/posix/defined-symbols.txt

@@ -143,6 +143,7 @@ __loc_is_allocated
 __locale_lock
 __locale_lockptr
 __localtime_r
+__lock
 __log2_data
 __log2f_data
 __log_data
@@ -285,6 +286,7 @@ __tre_mem_new_impl
 __tsearch_balance
 __uflow
 __unlist_locked_file
+__unlock
 __uselocale
 __utc
 __wait

expected/wasm32-wasi/posix/undefined-symbols.txt

@@ -61,7 +61,6 @@ __imported_wasi_snapshot_preview1_sock_send
 __imported_wasi_snapshot_preview1_sock_shutdown
 __imported_wasi_snapshot_preview2_thread_spawn
 __letf2
-__lock
 __lockfile
 __lttf2
 __main_argc_argv
@@ -72,7 +71,6 @@ __thread_list_lock
 __tls_base
 __trunctfdf2
 __trunctfsf2
-__unlock
 __unlockfile
 __unordtf2
 __wasilibc_pthread_self