x86-64: Use R10 for profiling large model

x86-64: Use R10 for profiling large model

R10 is caller-saved.  Although it can be used as a static chain register,
it is preserved when calling mcount for nested functions.  Use R10 as a
scratch register to call mcount in large model.

gcc/

	PR target/98482
	* config/i386/i386.c (x86_function_profiler): Use R10 to call
	mcount in large model.  Sorry for large model with PIC.

gcc/testsuite/

	PR target/98482
	* gcc.target/i386/pr98482-1.c: New test.
	* gcc.target/i386/pr98482-1.c: Likewise.