[PATCH, bootstrap]: Add bootstrap-lto-noplugin build configuration (PR65537)

[Gerald Pfeifer]

On Mon, 6 Apr 2015, Sandra Loosemore wrote:
> s/frontend/front end/  ??
> 
> (Since we have "middle end" and "back end" on the previous line.)

Absolutely -- I should have caught this.  Is also is in line with 
https://gcc.gnu.org/codingconventions.html.

Here is the updated patch I just committed.

2015-04-08  Gerald Pfeifer  <gerald@pfeifer.com>

	* doc/install.texi (bootstrap-lto-noplugin): Rewrite. 

Index: doc/install.texi
===================================================================
--- doc/install.texi	(revision 221916)
+++ doc/install.texi	(working copy)
@@ -2525,10 +2525,10 @@
 
 @item @samp{bootstrap-lto-noplugin}
 This option is similar to @code{bootstrap-lto}, but is intended for
-hosts that do not support the linker plugin. Please note that static
-libraries are not compiled with link time optimizations without
-linker plugin.  Since GCC middle-end and back-end are in libbackend.a,
-it means that only part of the frontend is actually LTO optimized.
+hosts that do not support the linker plugin.  Without the linker plugin 
+static libraries are not compiled with link-time optimizations.  Since 
+the GCC middle end and back end are in @file{libbackend.a} this means
+that only the front end is actually LTO optimized.
 
 @item @samp{bootstrap-debug}
 Verifies that the compiler generates the same executable code, whether