Add header for std::search to testcase

	* testsuite/experimental/functional/searchers.cc: Include <algorithm>
	for std::search.

From-SVN: r238341

libstdc++-v3/ChangeLog

 2016-07-14  Jonathan Wakely  <jwakely@redhat.com>
 
+	* testsuite/experimental/functional/searchers.cc: Include <algorithm>
+	for std::search.
+
 	PR libstdc++/70716
 	* include/bits/forward_list.h (forward_list): Update doxygen comments
 	to reflect allocator propagation semantics. Remove ambiguous

libstdc++-v3/testsuite/experimental/functional/searchers.cc

@@ -22,6 +22,7 @@
 #ifdef _GLIBCXX_USE_WCHAR_T
 # include <cwchar>
 #endif
+#include <algorithm>
 #include <testsuite_hooks.h>
 
 using std::experimental::make_default_searcher;