Update Alpine Linux sample to latest Finit dev.

- Show progress when booting
- Use noclear + nowait on TTY's
- Update `loadkmap` args

Works on Alpine Linux 3.4 .. 3.6

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

contrib/alpine/README.md

@@ -1,5 +1,5 @@
-HowTo: Finit on Alpine Linux 3.4
-================================
+HowTo: Finit on Alpine Linux 3.4-3.6
+====================================
 
 Mini HowTo using Finit to boot an Alpine Linux system.  It is assumed
 that the user has already installed a compiler, C library header files,
@@ -11,11 +11,12 @@ look for libraries and header files there.  So the `PKG_CONFIG_LIBDIR`
 environment variable has to be used:
 
     alpine:~/finit# PKG_CONFIG_LIBDIR=/usr/local/lib/pkgconfig ./configure \
-        --enable-rw-rootfs            --enable-x11-common-plugin           \
+        --enable-rw-rootfs            --enable-progress                    \
+                                      --enable-x11-common-plugin           \
         --enable-alsa-utils-plugin    --enable-inetd-echo-plugin           \
         --enable-inetd-chargen-plugin --enable-inetd-daytime-plugin        \
         --enable-inetd-discard-plugin --enable-inetd-time-plugin           \
-        --with-heading="Alpine Linux 3.4" --with-hostname=alpine
+        --with-heading="Alpine Linux 3.6" --with-hostname=alpine
 
 The plugins are optional, but the other configure flags are *not*.