build: omit -gline-tables-only for --enable-asan

`-gline-tables-only` is a clang-only flag.  Drop it, it's not needed for
address sanitizer-enabled builds and it makes it impossible to build
with gcc.

Fixes: https://github.com/nodejs/node/issues/3656
PR-URL: https://github.com/nodejs/node/pull/3680
Reviewed-By: Fedor Indutny <fedor@indutny.com>

common.gypi

@@ -183,7 +183,6 @@
           '-fsanitize=address',
           '-DLEAK_SANITIZER'
         ],
-        'cflags_cc+': [ '-gline-tables-only' ],
         'cflags!': [ '-fomit-frame-pointer' ],
         'ldflags': [ '-fsanitize=address' ],
       }],