This patch contains the GCN port of libgcc.

Since the previous posting, I've removed gomp_print.c and reduction.c,
as well as addressing some other feedback.

2018-11-16  Andrew Stubbs  <ams@codesourcery.com>
	    Kwok Cheung Yeung  <kcy@codesourcery.com>
	    Julian Brown  <julian@codesourcery.com>
	    Tom de Vries  <tom@codesourcery.com>

	libgcc/
	* config.host: Recognize amdgcn*-*-amdhsa.
	* config/gcn/crt0.c: New file.
	* config/gcn/lib2-divmod-hi.c: New file.
	* config/gcn/lib2-divmod.c: New file.
	* config/gcn/lib2-gcn.h: New file.
	* config/gcn/sfp-machine.h: New file.
	* config/gcn/t-amdgcn: New file.
---
 libgcc/config.host                 |   8 +++
 libgcc/config/gcn/crt0.c           |  23 ++++++++
 libgcc/config/gcn/lib2-divmod-hi.c | 117 +++++++++++++++++++++++++++++++++++++
 libgcc/config/gcn/lib2-divmod.c    | 117 +++++++++++++++++++++++++++++++++++++
 libgcc/config/gcn/lib2-gcn.h       |  49 ++++++++++++++++
 libgcc/config/gcn/sfp-machine.h    |  51 ++++++++++++++++
 libgcc/config/gcn/t-amdgcn         |  16 +++++
 7 files changed, 381 insertions(+)
 create mode 100644 libgcc/config/gcn/crt0.c
 create mode 100644 libgcc/config/gcn/lib2-divmod-hi.c
 create mode 100644 libgcc/config/gcn/lib2-divmod.c
 create mode 100644 libgcc/config/gcn/lib2-gcn.h
 create mode 100644 libgcc/config/gcn/sfp-machine.h
 create mode 100644 libgcc/config/gcn/t-amdgcn