simplify the RPM specification file

The rpms-* files all started with lines beginning with '#' which would
suggest a unix-script-style comment, but when the '#' was applied as an
inline comment, the install-rpms script treated that as part of the
package name, breaking it. Having those comments also meant that they
have to be stripped when processing.

This patch moves the content of those comments to a standalone README,
simplifying the sytnax of the file so it can be used as-is in the
install-rpms script.

bootstrap/install-rpms/README.md

@@ -0,0 +1,19 @@
+# Bootstrapping - RPM installation
+
+This directory contains all the files required to install necessary RPMs when
+building the image.
+
+In the files with RPM list use a path specification for local rpm, otherwise
+it'll be installed from one of the repos used for bootstrapping.
+
+* `rpms-build`
+
+    Specifies extra rpms to be installed in the build base-image.
+
+* `rpms-common`
+
+    Specifies common rpms to be installed in all base-images
+
+* `rpms-devel`
+
+    Specifies extra rpms to be installed in the devel base-image

bootstrap/install-rpms/rpms-build

@@ -1,4 +1 @@
-# Specify extra rpms to be installed in the build base-image.
-# Use a path specification for local rpm, otherwise it'll be installed
-# from one of the repos used for bootstrapping.
 /RPMS/eext-repos-build.rpm

bootstrap/install-rpms/rpms-common

@@ -1,6 +1,3 @@
-# Specify common rpms to be installed in all base-images
-# Use a path specification for local rpm, otherwise it'll be installed
-# from one of the repos used for bootstrapping.
 autoconf
 automake
 coreutils

bootstrap/install-rpms/rpms-devel

@@ -1,6 +1,3 @@
-# Specify extra rpms to be installed in the devel base-image
-# Use a path specification for local rpm, otherwise it'll be installed
-# from one of the repos used for bootstrapping.
 /RPMS/eext-repos-devel.rpm
 golang
 sudo