bug#70246: 30.0.50; Update INSTALL for native compilation

[Stephen Berman]

The INSTALL file in the Emacs sources makes no reference to native
compilation.  The attached patch is an attempt to fill this gap (but I'm
not sure about the default locations of installed natively compiled Lisp
files, since I do not install Emacs when I build and do not have a
distribution installation of Emacs built with native compilation to
check).

In GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
 3.24.41, cairo version 1.18.0) of 2024-03-31 built on strobelfs
Repository revision: 09f381d70d8852d90cdd3c8d7e1e2786dbc61f92
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12101011
System Description: Linux From Scratch r12.1-30

Configured using:
 'configure 'CFLAGS=-Og -g3' PKG_CONFIG_PATH=/opt/qt5/lib/pkgconfig'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
LCMS2 LIBSYSTEMD LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG
RSVG SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS WEBP X11
XDBE XIM XINPUT2 XPM GTK3 ZLIB

txtoBBGj9GZVq.txt
Description: INSTALL patch