Check for embedded copies of libraw

Signed-off-by: Niels Thykier <niels@thykier.net>
c/binaries: Look for mcount (etc.) on all architectures

When testing an ELF binary for being compiled with profiling options,
look also for "mcount" (or "_mcount" or "__mcount").  According to the
binutils documentation, one of the "mcount" symbols will be present[1].

[1] http://sourceware.org/binutils/docs/gprof/Implementation.html

Signed-off-by: Niels Thykier <niels@thykier.net>