asan-dg.exp (asan_link_flags): Save ld_library_path.

asan-dg.exp (asan_link_flags): Save ld_library_path.

gcc/testsuite/

2014-10-10  Max Ostapenko  <m.ostapenko@partner.samsung.com>

	* lib/asan-dg.exp (asan_link_flags): Save ld_library_path.
	(asan_finish): Remove restore_ld_library_path_env_vars.
	Restore ld_library_path with saved value. Restore LD_LIBRARY_PATH
	related env variables by calling set_ld_library_path_env_vars.
	* lib/tsan-dg.exp (tsan_link_flags): Save ld_library_path.
	(tsan_finish): Remove restore_ld_library_path_env_vars.
	Restore ld_library_path with saved value. Restore LD_LIBRARY_PATH
	related env variables by calling set_ld_library_path_env_vars.
	* lib/ubsan-dg.exp (ubsan_link_flags): Save ld_library_path.
	(ubsan_finish): Remove restore_ld_library_path_env_vars.
	Restore ld_library_path with saved value. Restore LD_LIBRARY_PATH
	related env variables by calling set_ld_library_path_env_vars.

From-SVN: r216082