gprofng: Use symver attribute if available

gprofng: Use symver attribute if available

Use symver attribute if available, instead of asm statement, to support
LTO build.

	PR gprof/28962
	* libcollector/dispatcher.c (timer_create@@GLIBC_2.3.3): Use
	SYMVER_ATTRIBUTE.
	(timer_create@GLIBC_2.2): Likewise.
	(timer_create@GLIBC_2.2.5): Likewise.
	(pthread_create@@GLIBC_2.1): Likewise.
	(pthread_create@GLIBC_2.0): Likewise.
	* libcollector/iotrace.c (open64@@GLIBC_2.2): Likewise.
	(open64@GLIBC_2.1): Likewise.
	(fopen@@GLIBC_2.1): Likewise.
	(fopen@GLIBC_2.0): Likewise.
	(fclose@@GLIBC_2.1): Likewise.
	(fclose@GLIBC_2.0): Likewise.
	(fdopen@@GLIBC_2.1): Likewise.
	(fdopen@GLIBC_2.0): Likewise.
	(pread@@GLIBC_2.2): Likewise.
	(pread@GLIBC_2.1): Likewise.
	(pwrite@@GLIBC_2.2): Likewise.
	(pwrite@GLIBC_2.1): Likewise.
	(pwrite64@@GLIBC_2.2): Likewise.
	(pwrite64@GLIBC_2.1): Likewise.
	(fgetpos@@GLIBC_2.2): Likewise.
	(fgetpos@GLIBC_2.0): Likewise.
	(fgetpos64@@GLIBC_2.2): Likewise.
	(fgetpos64@GLIBC_2.1): Likewise.
	(fsetpos@@GLIBC_2.2): Likewise.
	(fsetpos@GLIBC_2.0): Likewise.
	(fsetpos64@@GLIBC_2.2): Likewise.
	(fsetpos64@GLIBC_2.1): Likewise.
	* libcollector/linetrace.c (posix_spawn@@GLIBC_2.15): Likewise.
	(posix_spawn@GLIBC_2.2): Likewise.
	(posix_spawn@GLIBC_2.2.5): Likewise.
	(posix_spawnp@@GLIBC_2.15): Likewise.
	(posix_spawnp@GLIBC_2.2): Likewise.
	(posix_spawnp@GLIBC_2.2.5): Likewise.
	(popen@@GLIBC_2.1): Likewise.
	(popen@GLIBC_2.0): Likewise.
	(_popen@@GLIBC_2.1): Likewise.
	(_popen@GLIBC_2.0): Likewise.
	* libcollector/mmaptrace.c (dlopen@@GLIBC_2.1): Likewise.
	(dlopen@GLIBC_2.0): Likewise.
	* libcollector/synctrace.c (pthread_cond_wait@@GLIBC_2.3.2):
	Likewise.
	(pthread_cond_wait@GLIBC_2.0): Likewise.
	(pthread_cond_wait@GLIBC_2.2.5): Likewise.
	(pthread_cond_wait@GLIBC_2.2): Likewise.
	(pthread_cond_timedwait@@GLIBC_2.3.2): Likewise.
	(pthread_cond_timedwait@GLIBC_2.0): Likewise.
	(pthread_cond_timedwait@GLIBC_2.2.5): Likewise.
	(pthread_cond_timedwait@GLIBC_2.2): Likewise.
	(sem_wait@@GLIBC_2.1): Likewise.
	(sem_wait@GLIBC_2.0): Likewise.
	* src/collector_module.h (SYMVER_ATTRIBUTE): New.