Speculatively fix GCC 4.7 build after r219938

llvm-svn: 219941
diff --git a/clang/tools/driver/driver.cpp b/clang/tools/driver/driver.cpp
index b7f7fbf..f411cf9 100644
--- a/clang/tools/driver/driver.cpp
+++ b/clang/tools/driver/driver.cpp
@@ -244,7 +244,7 @@
 
   for (int Components = 2; Components; --Components) {
     auto I = std::find_if(std::begin(suffixes), std::end(suffixes),
-                          [&](const decltype(suffixes[0]) &suffix) {
+                          [&](decltype(suffixes[0]) &suffix) {
       return ProgNameRef.endswith(suffix.Suffix);
     });