Update sqlite to 3.7.3.

third_party/sqlite/src/test/thread_common.tcl

Index: third_party/sqlite/src/test/thread_common.tcl
diff --git a/third_party/sqlite/src/test/thread_common.tcl b/third_party/sqlite/src/test/thread_common.tcl
old mode 100755
new mode 100644
index bbd9389ea03cd656c01cc34357ec801078c4bf3b..9b7a95dd9a02d632bd739a6443ea8480cd1ab9d2
--- a/third_party/sqlite/src/test/thread_common.tcl
+++ b/third_party/sqlite/src/test/thread_common.tcl
@@ -80,7 +80,7 @@ set thread_procs {
 }
 
 proc thread_spawn {varname args} {
-  sqlthread spawn $varname [join $args ;]
+  sqlthread spawn $varname [join $args {;}]
 }
 
 # Return true if this build can run the multi-threaded tests.
@@ -96,16 +96,10 @@ proc run_thread_tests {{print_warning 0}} {
     set zProblem "Linked against a non-threadsafe Tcl build"
   }
   if {[info exists zProblem]} {
-    if {$print_warning} {
-      if {[info exists ::run_thread_tests_failed]} {
-        puts "WARNING: Multi-threaded tests skipped: $zProblem"
-      }
-    } else {
-      puts "Skipping thread tests: $zProblem"
-      set ::run_thread_tests_failed 1
-    }
+    puts "WARNING: Multi-threaded tests skipped: $zProblem"
     return 0
   }
+  set ::run_thread_tests_called 1
   return 1;
 }