re PR testsuite/28870 (configuring, over-riding timeout values in testsuite)

gcc/
	PR testsuite/28870
	* doc/sourcebuild.texi (Test Directives): Add dg-timeout and
	dg-timeout-factor.

gcc/testsuite/
	PR testsuite/28870
	* lib/timeout.exp: New.
	* lib/timeout-dg.exp: New.
	* lib/gcc-dg.exp: Include new timeout library files.
	(dg-test): Unset timeout variables.
	* lib/gcc.exp (gcc_target_compile): Set timeout value from new proc.
	* lib/g++.exp (g++_target_compile): Ditto.
	* lib/gfortran.exp (gfortran_target_compile): Ditto.
	* lib/objc.exp (objc_target_compile): Ditto.
	* lib/obj-c++.exp (obj-c++_target_compile): Ditto.
	* lib/obj-c++.exp (obj-c++_target_compile): Ditto.
	* lib/gnat.exp (gnat_target_compile): Ditto.

libstdc++-v3/
	PR testsuite/28870
	* testsuite/lib/libstdc++.exp: Include new timeout library files.
	(libstdc++_init): Define tool_timeout.
	(dg-test): Override DejaGnu proc.
	(v3_target_compile): Set timeout value from new proc.
	(v3_target_compile_as_c): Ditto.

libmudflap/
	PR testsuite/28870
	* testsuite/lib/mfdg.exp (dg-test): Use new timeout support.
	(dg-timeout): Remove.
	(standard-wait): Remove.
	* testsuite/lib/libmudflap.exp: Include new timeout library files.
	(libmudflap_target_compile): Set timeout value from new proc.

libgomp/
	PR testsuite/28870
	* testsuite/lib/libgomp.exp: Include new timeout library files.
	(libgomp_target_compile): Set timeout value from new proc.

From-SVN: r142225