doc: Correct `--enable-version-specific-runtime-libs' support information
The `--enable-version-specific-runtime-libs' configuration option is now
supported throughout all of our target library subdirectories, so update
installation documentation accordingly and also mention that the default
for the option is `yes' for libada and `no' for the remaining libraries.
gcc/
* doc/install.texi (Options specification): Remove the list of
target library subdirectories supporting
`--enable-version-specific-runtime-libs'. Document defaults for
the option.
From-SVN: r278871