Fix --enable-profiling bug introduced by 2013-02-25 change.
This bug was introduced by my 2013-02-25 change that simplified data_start configuration. Without this change, on GNU/Linux an Emacs configured with --enable-profiling fails immediately due to a profiler signal. * configure.ac (LD_SWITCH_SYSTEM_TEMACS): Append -pg if profiling and if not on GNU/Linux or FreeBSD. * lib/Makefile.am (AM_CFLAGS): Add $(PROFILING_CFLAGS), so that lib/*.o is profiled too. * src/Makefile.in: Compile with $(PROFILING_CFLAGS), but do not link with these flags. On platforms where special flags are needed when linking temacs, the flags are now in LD_SWITCH_SYSTEM_TEMACS. (ALL_CFLAGS): Remove $(PROFILING_CFLAGS). (.c.o, .m.o): Compile with $(PROFILING_CFLAGS). Fixes: debbugs:13783
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