ToolChains.cpp: Increase size of Lines vector in DetectDistro

In a Clang bootstrap, the size of this vector was always 11.

llvm-svn: 215370
diff --git a/clang/lib/Driver/ToolChains.cpp b/clang/lib/Driver/ToolChains.cpp
index dfd5cb3..9b88080 100644
--- a/clang/lib/Driver/ToolChains.cpp
+++ b/clang/lib/Driver/ToolChains.cpp
@@ -2796,7 +2796,7 @@
       llvm::MemoryBuffer::getFile("/etc/lsb-release");
   if (File) {
     StringRef Data = File.get()->getBuffer();
-    SmallVector<StringRef, 8> Lines;
+    SmallVector<StringRef, 16> Lines;
     Data.split(Lines, "\n");
     Distro Version = UnknownDistro;
     for (unsigned i = 0, s = Lines.size(); i != s; ++i)