rust: Add a new tool called 'pvimg'

Add a new tool called 'pvimg' that can be used to create and inspect
Secure Execution images. It has several subcommands:

 + create: create an IBM Secure Execution image (genprotimg compatible
	  sytnax) and C-'genprotimg' is going to be replaced by a
	  symlink to this subcommand.
 + test: test various aspects of an existing Secure Execution image
 + info: print information about an existing Secure Execution
	 image (experimental API!)
 + version: print version and exit

As mentioned above, the 'genprotimg' tool is now a symbolic link to the
'pvimg create' subcommand and the CLI is backward compatible with the
original genprotimg CLI, with the following exceptions:

  - '-v' increases the verbosity instead of showing the version
  - '-V' is now deprecated in favor of '-v'
  - an existing output file is no longer silently overwritten, but there
    is a new flag '--overwrite' to get the original behavior
  - experimental options are no longer described in the help
  - the commands '--cert ...' and '--root-ca' are now mutually exclusive
  - to '--no-verify'
  - there is now a component check, e.g. it checks if the specified
    Linux kernel looks like a raw binary s390x kernel. These checks can be
    disabled by using the new command line flag '--no-component-check'

Acked-by: Steffen Eiden <seiden@linux.ibm.com>
Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>

rust/Makefile

@@ -25,7 +25,7 @@ endif #HOSTARCH
 
 ifneq (${HAVE_OPENSSL},0)
 ifneq (${HAVE_LIBCURL},0)
-	PV_TARGETS := pvsecret pvattest
+	PV_TARGETS := pvsecret pvattest pvimg
 
 ifeq ($(HOST_ARCH),s390x)
 	PV_TARGETS += pvapconfig
@@ -88,6 +88,7 @@ install: $(INSTALL_TARGETS)
 	$(INSTALL) -d -m 755 $(DESTDIR)$(PVIMG_PKGDATADIR)
 	$(INSTALL) -g $(GROUP) -o $(OWNER) -m 755 pvimg/tools/check_hostkeydoc $(DESTDIR)$(PVIMG_PKGDATADIR)
 	$(MAKE) -C pvimg/boot install
+	ln -sf pvimg $(DESTDIR)$(USRBINDIR)/genprotimg
 
 print-rust-targets:
 	echo $(BUILD_TARGETS)