Add make target for standalone sk-libfido2

Add a Makefile target for sk-libfido2, the standalone fido2 security
key shared library, suitable for use with the SecurityKeyProvider
option.

Add a new configure option `--with-security-key-standalone` that
optionally sets the shared library target sk-libfido2$(SHLIBEXT), and
adds it to $(TARGETS).

misc.h is required when SK_STANDALONE is defined, because of the use
of `monotime_tv` in `sk_select_by_touch`.

Sets the shared library extension for sk-libfido2 is by setting
`SHLIBEXT` depending on the platform in configure.ac.

Add the shared library to the CI builds in the `sk` target config to
make sure it can compile under the same conditions as
`--with-security-key-builtin`.

Add a libssh-pic.a static library that compiles with `-fPIC` reusing
.c.lo method in sk-dummy.so for use in the shared library sk-libfido2.

Note, a separate static library libssh-pic.a is needed, since defining
-DSK_STANDALONE excludes some symbols needed in sshkey.lo.

1 files changed, 1 insertions, 1 deletions

diff --git a/.github/configs b/.github/configs
index 376398a5b..3cdcfeac7 100755
--- a/.github/configs
+++ b/.github/configs
@@ -181,7 +181,7 @@ case "$config" in
 	CONFIGFLAGS="--with-selinux"
 	;;
     sk)
-	CONFIGFLAGS="--with-security-key-builtin"
+	CONFIGFLAGS="--with-security-key-builtin --with-security-key-standalone"
         ;;
     without-openssl)
 	LIBCRYPTOFLAGS="--without-openssl"