fuzzer: excersizes query code on xml doc #189

Job	Run time
windows (Win32, standard)	2m 16s
windows (Win32, PUGIXML_WCHAR_MODE)	2m 3s
windows (Win32, PUGIXML_COMPACT)	2m 37s
windows (Win32, PUGIXML_NO_EXCEPTIONS)	2m 2s
windows (x64, standard)	1m 26s
ubuntu (g++, standard)	1m 29s
ubuntu (g++, PUGIXML_WCHAR_MODE)	1m 12s
windows (x64, PUGIXML_WCHAR_MODE)	1m 27s
windows (x64, PUGIXML_COMPACT)	2m 16s
ubuntu (g++, PUGIXML_COMPACT)	1m 12s
windows (x64, PUGIXML_NO_EXCEPTIONS)	2m 29s
ubuntu (g++, PUGIXML_NO_EXCEPTIONS)	1m 5s
ubuntu (clang++, standard)	51s
ubuntu (clang++, PUGIXML_WCHAR_MODE)	53s
ubuntu (clang++, PUGIXML_COMPACT)	54s
ubuntu (clang++, PUGIXML_NO_EXCEPTIONS)	48s
macos (clang++, standard)	1m 38s
macos (clang++, PUGIXML_WCHAR_MODE)	1m 18s
macos (clang++, PUGIXML_COMPACT)	1m 15s
macos (clang++, PUGIXML_NO_EXCEPTIONS)	2m 46s
	31m 57s

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