[committed] Fix install.texi typo

[Jakub Jelinek]

Hi!

I have noticed a typo in spelling of the configure option in the example.
Furthermore, it was listing targets that are not realy offload target, so
this patch changed them to really supported offload targets.

Bootstrapped on x86_64-linux and i686-linux, committed to trunk as obvious.

2019-10-29  Jakub Jelinek  <jakub@redhat.com>

	* doc/install.texi (--enable-offload-targets): Fix up a typo in the
	example, use actual names of supported offload targets.

--- gcc/doc/install.texi.jj	2019-10-25 09:31:05.000000000 +0200
+++ gcc/doc/install.texi	2019-10-27 10:04:20.830707973 +0100
@@ -2158,7 +2158,7 @@ specifying paths @var{path1}, @dots{}, @
 
 @smallexample
 % @var{srcdir}/configure \
-    --enable-offload-target=i686-unknown-linux-gnu=/path/to/i686/compiler,x86_64-pc-linux-gnu
+    --enable-offload-targets=x86_64-intelmicemul-linux-gnu=/path/to/x86_64/compiler,nvptx-none,hsa
 @end smallexample
 
 If @samp{hsa} is specified as one of the targets, the compiler will be

	Jakub