testsuite: Fix gcc.dg/pr111409.c on Solaris/SPARC with as

testsuite: Fix gcc.dg/pr111409.c on Solaris/SPARC with as

gcc.dg/pr111409.c FAILs on Solaris/SPARC with the native as:

FAIL: gcc.dg/pr111409.c scan-assembler-times .section\\\\s+.debug_macro 1

Unlike most other ELF targets, that assembler requires the section name to
be double-quoted.  This patch allows for that.  It also expects \t to
separate .section directive and name like other similar tests, and escapes
literal dots.

Tested on sparc-sun-solaris2.11 (as and gas) and i386-pc-solaris2.11 (as
and gas).

2023-11-23  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	gcc/testsuite:
	* gcc.dg/pr111409.c: Allow for " before .debug_macro.
	Quote literals dots.