Increase the size of two SmallVectors in Generic_GCC::GCCInstallationDetector::init

In a bootstrap build of Clang, the size was always greater than 12.

llvm-svn: 215369
diff --git a/clang/lib/Driver/ToolChains.cpp b/clang/lib/Driver/ToolChains.cpp
index 5395b85..dfd5cb3 100644
--- a/clang/lib/Driver/ToolChains.cpp
+++ b/clang/lib/Driver/ToolChains.cpp
@@ -1220,8 +1220,8 @@
   // The library directories which may contain GCC installations.
   SmallVector<StringRef, 4> CandidateLibDirs, CandidateBiarchLibDirs;
   // The compatible GCC triples for this particular architecture.
-  SmallVector<StringRef, 10> CandidateTripleAliases;
-  SmallVector<StringRef, 10> CandidateBiarchTripleAliases;
+  SmallVector<StringRef, 16> CandidateTripleAliases;
+  SmallVector<StringRef, 16> CandidateBiarchTripleAliases;
   CollectLibDirsAndTriples(TargetTriple, BiarchVariantTriple, CandidateLibDirs,
                            CandidateTripleAliases, CandidateBiarchLibDirs,
                            CandidateBiarchTripleAliases);