re PR testsuite/55587 ([ASAN] Testsuite test c-c++-common/asan/memcmp-1.c fails to link on targets without libasan/libsanitizer)
PR testsuite/55587
* lib/asan-dg.exp (asan_init): Return 1 if libasan has been found,
0 if not.
* g++.dg/asan/asan.exp: Don't run gcc-dg-runtest if [asan_init]
returned 0.
* gcc.dg/asan/asan.exp: Likewise.
From-SVN: r194134
