reduce size of SmallString to something more reasonable

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80710 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp b/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
index 244188a..20af405 100644
--- a/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
+++ b/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
@@ -160,7 +160,7 @@
       std::string Name;
 
       if (ACPV->isLSDA()) {
-        SmallString<256> LSDAName;
+        SmallString<16> LSDAName;
         raw_svector_ostream(LSDAName) << MAI->getPrivateGlobalPrefix() <<
           "_LSDA_" << getFunctionNumber();
         Name = LSDAName.str();