Added some documentation about the anyboot images. Verification appreciated.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36601 a95241bf-73f2-0310-859d-f6bbb57e9c96

build/jam/UserBuildConfig.ReadMe

@@ -181,6 +181,8 @@ AddGroupToHaikuImage party : 101 : baron walter ;
 #           installed. No image name or path is given, so the defaults
 #            ("haiku.vmdk" in the generated directory) will be used, unless the
 #           respective variables are set.
+# anyboot - A custom image (type "anyboot-image"), its size will be 4 MB larger
+#           than the value of HAIKU_IMAGE_SIZE, named haiku-anyboot.image.
 # crash   - Similar to the vmware profile, but created at a specific location
 #           and 1 GB size. Furthermore a "crash-tests" directory will be copied
 #           to the image.
@@ -189,6 +191,7 @@ AddGroupToHaikuImage party : 101 : baron walter ;
 DefineBuildProfile disk : disk : "/dev/sda57" ;
 DefineBuildProfile qemu : image : "haiku-qemu.image" ;
 DefineBuildProfile vmware : vmware-image ;
+DefineBuildProfile anyboot : anyboot-image : "haiku-anyboot.image" ;
 DefineBuildProfile crash : vmware-image
 	: "/home/foobar/vmware/Virtual Machines/CrashOMatic/CrashOMatic.vmdk" ;
 DefineBuildProfile install : install : /Haiku2 ;
@@ -210,6 +213,10 @@ switch $(HAIKU_BUILD_PROFILE) {
 		AddOptionalHaikuImagePackages Development Pe ;
 	}
 
+	case "anyboot" : {
+		HAIKU_IMAGE_SIZE = 400 ;
+	}
+
 	case "crash" : {
 		HAIKU_IMAGE_SIZE = 1024 ;
 		HAIKU_DONT_CLEAR_IMAGE = 1 ;