[binutils-gdb] compile: Fix GNU-IFUNC funcs called from injected code

[sergiodj+buildbot at redhat dot com]

*** TEST RESULTS FOR COMMIT 081a1c2cede38dfb837e3d89539416fd836be4fe ***

Author: Jan Kratochvil <jan.kratochvil@redhat.com>
Branch: master
Commit: 081a1c2cede38dfb837e3d89539416fd836be4fe

compile: Fix GNU-IFUNC funcs called from injected code
One could not call IFUNCs (=indirect functions) from the compiled injected
code.  Either it errored with:
	gdb command line:1:1: error: function return type cannot be function

or it just called the IFUNC dispatcher in normal way, returning real function
implementation address instead of the function return value (and thus no
function was called).

gdb/ChangeLog
2015-02-26  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* compile/compile-c-symbols.c (convert_one_symbol, convert_symbol_bmsym)
	(gcc_symbol_address): Call gnu_ifunc_resolve_addr.

gdb/testsuite/ChangeLog
2015-02-26  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* gdb.compile/compile-ifunc.c: New file.
	* gdb.compile/compile-ifunc.exp: New file.