Update sqlite to 3.7.3.

third_party/sqlite/src/test/exclusive.test

Index: third_party/sqlite/src/test/exclusive.test
diff --git a/third_party/sqlite/src/test/exclusive.test b/third_party/sqlite/src/test/exclusive.test
index 2c1b35034855727ba5817a5f6a5eca3e772d3c06..33cd667d27af9c55956c4ab7167019e32531c72d 100644
--- a/third_party/sqlite/src/test/exclusive.test
+++ b/third_party/sqlite/src/test/exclusive.test
@@ -212,7 +212,7 @@ do_test exclusive-2.8 {
     ROLLBACK;
   } db2
 } {}
-sqlite3_soft_heap_limit $soft_limit
+sqlite3_soft_heap_limit $cmdlinearg(soft-heap-limit)
 
 do_test exclusive-2.9 {
   # Write the database to establish the exclusive lock with connection 'db.
@@ -253,6 +253,11 @@ db2 close
 # from being inspected externally.
 #
 if {$tcl_platform(platform) != "windows"} {
+
+  # Return a list of two booleans (either 0 or 1). The first is true
+  # if the named file exists. The second is true only if the file
+  # exists and the first 28 bytes contain at least one non-zero byte.
+  #
   proc filestate {fname} {
     set exists 0
     set content 0
@@ -263,6 +268,7 @@ if {$tcl_platform(platform) != "windows"} {
     }
     list $exists $content
   }
+
   do_test exclusive-3.0 {
     filestate test.db-journal
   } {0 0}
@@ -390,7 +396,7 @@ do_test exclusive-4.5 {
 # longer active.
 #
 db close
-sqlite db test.db
+sqlite3 db test.db
 
 # if we're using proxy locks, we use 3 filedescriptors for a db
 # that is open but NOT writing changes, normally