Allow multi-word "install" command.

Autoconf can determine that the correct install command includes flags,
e.g., "/usr/bin/install -c". When using this as a command, we can't
enclose the value in double-quotes, as that makes some shells use the
whole expression as a filename:

# this is the value returned by autoconf and stored in CT_install
$ ins="/usr/bin/install -c"

# if we call it with quotes, the command is not found
$ "${ins}"
bash: /usr/bin/install -c: No such file or directory

# removing the quotes lets it work as expected
$ ${ins}
/usr/bin/install: missing file operand
Try `/usr/bin/install --help' for more information.

Signed-Off-By: Anthony Foiani <anthony.foiani@gmail.com>

Enable using a shell other than bash.

Courtesy "Martin Guy" <martinwguy@yahoo.it>

http://sourceware.org/ml/crossgcc/2008-08/msg00037.html

--- binutils-2.18.orig/ld/genscripts.sh	2007-08-12 20:00:07.000000000 +0100

+++ binutils-2.18/ld/genscripts.sh	2008-08-25 16:09:54.000000000 +0100

@@ -398,9 +398,11 @@

     . $em_script

     em_script=$current_script

   }

-  fragment()

+  

+  alias fragment='em_lineno=$LINENO; fragment_em'

+  fragment_em()

   {

-    local lineno=$[${BASH_LINENO[0]} + 1]

+    local lineno=$[$em_lineno + 1]

     echo >> e${EMULATION_NAME}.c "#line $lineno \"$em_script\""

     cat >> e${EMULATION_NAME}.c

   }