[sql] Rewrite sqlite patching "system".

third_party/sqlite/sqlite-3.7.6.3-fix-out-of-scope-memory-reference.patch

Index: third_party/sqlite/sqlite-3.7.6.3-fix-out-of-scope-memory-reference.patch
diff --git a/third_party/sqlite/sqlite-3.7.6.3-fix-out-of-scope-memory-reference.patch b/third_party/sqlite/sqlite-3.7.6.3-fix-out-of-scope-memory-reference.patch
deleted file mode 100644
index a5b031b1d3ad70bfc7bd171a99dcc998d6e571af..0000000000000000000000000000000000000000
--- a/third_party/sqlite/sqlite-3.7.6.3-fix-out-of-scope-memory-reference.patch
+++ /dev/null
@@ -1,26 +0,0 @@
---- ext/fts3/fts3_write.c.orig	2012-05-08 21:05:03.000000000 +0300
-+++ ext/fts3/fts3_write.c	2012-05-08 21:07:08.000000000 +0300
-@@ -1238,13 +1238,13 @@ int sqlite3Fts3SegReaderPending(
-   Fts3SegReader **ppReader        /* OUT: SegReader for pending-terms */
- ){
-   Fts3SegReader *pReader = 0;     /* Fts3SegReader object to return */
-+  Fts3HashElem *pE;               /* Iterator variable */
-   Fts3HashElem **aElem = 0;       /* Array of term hash entries to scan */
-   int nElem = 0;                  /* Size of array at aElem */
-   int rc = SQLITE_OK;             /* Return Code */
- 
-   if( isPrefix ){
-     int nAlloc = 0;               /* Size of allocated array at aElem */
--    Fts3HashElem *pE = 0;         /* Iterator variable */
- 
-     for(pE=fts3HashFirst(&p->pendingTerms); pE; pE=fts3HashNext(pE)){
-       char *zKey = (char *)fts3HashKey(pE);
-@@ -1276,7 +1276,7 @@ int sqlite3Fts3SegReaderPending(
-     }
- 
-   }else{
--    Fts3HashElem *pE = fts3HashFindElem(&p->pendingTerms, zTerm, nTerm);
-+    pE = fts3HashFindElem(&p->pendingTerms, zTerm, nTerm);
-     if( pE ){
-       aElem = &pE;
-       nElem = 1;