Since MINSIGSTKSZ may not have sufficent stack space to allow lazy
binding, build tests for minimal signal handler with -Wl,-z,now to
disable lazy binding.
* signal/Makefile (LDFLAGS-tst-minsigstksz-1): New. Set to
-Wl,-z,now.
(LDFLAGS-tst-minsigstksz-2): Likewise.
(LDFLAGS-tst-minsigstksz-3): Likewise.
(LDFLAGS-tst-minsigstksz-3a): Likewise.
(LDFLAGS-tst-minsigstksz-4): Likewise.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>