elf: Add STT_GNU_IFUNC from glibc
elf: Add STT_GNU_IFUNC from glibc

perf in upstream Linux kernel 3.17 onwards expects STT_GNU_IFUNC
replicate it from glibc

Signed-off-by: Vineet Gupta <af669d95a4c0de051445d4cafdbb2c5c4a2838be@synopsys.com>
Signed-off-by: Bernhard Reutner-Fischer <ce1ac9e9ad16abccd7821f371ad381197b4768ac@gmail.com>

kraj/uClibc,foss-for-synopsys-dwc-arc-processors/uClibc,brgl/uclibc-ng,majek/uclibc-vx32,foss-for-synopsys-dwc-arc-processors/uClibc,kraj/uclibc-ng,brgl/uclibc-ng,brgl/uclibc-ng,majek/uclibc-vx32,brgl/uclibc-ng,kraj/uclibc-ng,foss-for-synopsys-dwc-arc-processors/uClibc,majek/uclibc-vx32,wbx-github/uclibc-ng,majek/uclibc-vx32,kraj/uClibc,foss-for-synopsys-dwc-arc-processors/uClibc,wbx-github/uclibc-ng,wbx-github/uclibc-ng,kraj/uClibc,kraj/uclibc-ng,kraj/uclibc-ng,kraj/uClibc,wbx-github/uclibc-ng