Update build.c

test
Update build.c

test again
Update func.c

today i edit two functions,including  CollSeq *sqlite3GetFuncCollSeq(sqlite3_context *context) and static void sqlite3SkipAccumulatorLoad(sqlite3_context *context).
Update func.c

更新到static void *contextMalloc(sqlite3_context *context, i64 nByte)函数
Merge pull request #12 from amy-lj/amy-lj&func

Update func.c
Update where.c
Update rtree.c
Merge pull request #15 from ShengtianM/master

Update rtree.c
Merge pull request #14 from Leroy1245/WhereAnalysis

Update where.c
Update rtree.c
Merge pull request #6 from rocsays/闫鹏

Update build.c
Merge pull request #16 from ShengtianM/patch-1

Update rtree.c
Merge pull request #4 from HuiLi/master

合并更新