Replece LDFLAGS-* = $(no-pie-ldflag) with tst-*-no-pie = yes [BZ #22630]

Replece LDFLAGS-* = $(no-pie-ldflag) with tst-*-no-pie = yes [BZ #22630]

After

commit 9d7a3741c9e59eba87fb3ca6b9f979befce07826
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Fri Dec 15 16:59:33 2017 -0800

    Add --enable-static-pie configure option to build static PIE [BZ #19574]

and

commit 00c714df398b63934540d95ce3792596f7a94a6c
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Mon Dec 18 12:24:26 2017 -0800

    Pass -no-pie to GCC only if GCC defaults to PIE [BZ #22614]

$(no-pie-ldflag) is no longer effective since no-pie-ldflag is defined
to -no-pie only if GCC defaults to PIE.  When --enable-static-pie is
used to configure glibc build and GCC doesn't default to PIE. no-pie-ldflag
is undefined and these tests:

elf/Makefile:LDFLAGS-tst-dlopen-aout = $(no-pie-ldflag)
elf/Makefile:LDFLAGS-tst-prelink = $(no-pie-ldflag)
elf/Makefile:LDFLAGS-tst-main1 = $(no-pie-ldflag)
gmon/Makefile:LDFLAGS-tst-gmon := $(no-pie-ldflag)

may fail to link.  This patch replaces "-pie" with

$(if $($(@F)-no-pie),$(no-pie-ldflag),-pie)

and repleces

LDFLAGS-* = $(no-pie-ldflag)

with

tst-*-no-pie = yes

so that tst-dlopen-aout, tst-prelink, tst-main1 and tst-gmon are always
built as non-PIE, with and without --enable-static-pie, regardless if
GCC defaults to PIE or non-PIE.

Tested with build-many-glibcs.py without --enable-static-pie as well as
with --enable-static-pie for x86_64, x32 and i686.

	[BZ #22630]
	* Makeconfig (link-pie-before-libc): Replace -pie with
	$(if $($(@F)-no-pie),$(no-pie-ldflag),-pie).
	* elf/Makefile (LDFLAGS-tst-dlopen-aout): Removed.
	(tst-dlopen-aout-no-pie): New.
	(LDFLAGS-tst-prelink): Removed.
	(tst-prelink-no-pie): New.
	(LDFLAGS-tst-main1): Removed.
	(tst-main1-no-pie): New.
	* gmon/Makefile (LDFLAGS-tst-gmon): Removed.
	(tst-gmon-no-pie): New.