Sema/ObjC: Override search can generate a large search list, bump the base size of the SmallPtrSet way up to avoid commonly reallocating the buffer size.  - I didn't see a good argument against it, so I bumped the limit to cover the    max size we see during parsing Cocoa.h.
Sema/ObjC: Override search can generate a large search list, bump the base size
of the SmallPtrSet way up to avoid commonly reallocating the buffer size.
 - I didn't see a good argument against it, so I bumped the limit to cover the
   max size we see during parsing Cocoa.h.

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@151698 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang