Added a wait with timeout to the platform semaphore class

SConstruct

 # Copyright 2008 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 133 matching lines @@
     'disassembler:on': {
       'CPPDEFINES':   ['ENABLE_DISASSEMBLER']
     }
   }
 }
 
 
 MKSNAPSHOT_EXTRA_FLAGS = {
   'gcc': {
     'os:linux': {
-      'LIBS': ['pthread'],
+      'LIBS': ['pthread', 'rt'],
     },
     'os:macos': {
       'LIBS': ['pthread'],
     },
     'os:freebsd': {
       'LIBS': ['pthread'],
     },
     'os:win32': {
       'LIBS': ['winmm', 'ws2_32'],
     },
@@ skipping 23 matching lines @@
 CCTEST_EXTRA_FLAGS = {
   'all': {
     'CPPPATH': [join(root_dir, 'src')],
     'LIBS': ['$LIBRARY']
   },
   'gcc': {
     'all': {
       'LIBPATH': [abspath('.')]
     },
     'os:linux': {
-      'LIBS':         ['pthread'],
+      'LIBS':         ['pthread', 'rt'],
     },
     'os:macos': {
       'LIBS':         ['pthread'],
     },
     'os:freebsd': {
       'LIBS':         ['execinfo', 'pthread']
     },
     'os:win32': {
       'LIBS': ['winmm', 'ws2_32']
     },
@@ skipping 17 matching lines @@
 SAMPLE_FLAGS = {
   'all': {
     'CPPPATH': [join(abspath('.'), 'include')],
     'LIBS': ['$LIBRARY'],
   },
   'gcc': {
     'all': {
       'LIBPATH': ['.']
     },
     'os:linux': {
-      'LIBS':         ['pthread'],
+      'LIBS':         ['pthread', 'rt'],
     },
     'os:macos': {
       'LIBS':         ['pthread'],
     },
     'os:freebsd': {
       'LIBS':         ['execinfo', 'pthread']
     },
     'os:win32': {
       'LIBS':         ['winmm', 'ws2_32']
     },
@@ skipping 47 matching lines @@
   }
 }
 
 
 D8_FLAGS = {
   'gcc': {
     'console:readline': {
       'LIBS': ['readline']
     },
     'os:linux': {
-      'LIBS': ['pthread'],
+      'LIBS': ['pthread', 'rt'],
     },
     'os:macos': {
       'LIBS': ['pthread'],
     },
     'os:freebsd': {
       'LIBS': ['pthread'],
     },
     'os:win32': {
       'LIBS': ['winmm', 'ws2_32'],
     },
@@ skipping 353 matching lines @@
 # version of scons.  Also, there's a bug in some revisions that
 # doesn't allow this flag to be set, so we swallow any exceptions.
 # Lovely.
 try:
   SetOption('warn', 'no-deprecated')
 except:
   pass
 
 
 Build()