Add back README

Author: osalbahr

README

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+This directory contains the GNU Compiler Collection (GCC).
+
+The GNU Compiler Collection is free software.  See the files whose
+names start with COPYING for copying permission.  The manuals, and
+some of the runtime libraries, are under different terms; see the
+individual source files for details.
+
+The directory INSTALL contains copies of the installation information
+as HTML and plain text.  The source of this information is
+gcc/doc/install.texi.  The installation information includes details
+of what is included in the GCC sources and what files GCC installs.
+
+See the file gcc/doc/gcc.texi (together with other files that it
+includes) for usage and porting information.  An online readable
+version of the manual is in the files gcc/doc/gcc.info*.
+
+See http://gcc.gnu.org/bugs/ for how to report bugs usefully.
+
+Copyright years on GCC source files may be listed using range
+notation, e.g., 1987-2012, indicating that every year in the range,
+inclusive, is a copyrightable year that could otherwise be listed
+individually.