gprofng: 30894 bison should be no hard dependency

When running from a distribution tarball, bison should not be necessary.
The generated files (QLParser.tab.cc, QLParser.tab.hh) should be distributed.
configure.ac should not abort if bison is missing.
configure.ac should remove temporary files (dummy.c, Simple.class).
bison must be run once to create QLParser.tab.cc and QLParser.tab.hh.

gprofng/ChangeLog
2023-10-03  Vladimir Mezentsev  <vladimir.mezentsev@oracle.com>

	PR gprofng/30894
	* configure.ac: Don't abort if bison is missing. Remove temporary files.
	* src/Makefile.am: Distribute QLParser.tab.cc and QLParser.tab.hh.
	* Run bison once to create QLParser.tab.cc and QLParser.tab.hh.
	* configure: Rebuild.
	* src/Makefile.in: Rebuild.