doc: Add seccomp_transaction_start.3 to Makefile.am

The transaction documentation was added in commit 72b0132 ("api:
add transaction support to the libseccomp API"), but we forgot to add
the newly added transactions doc to the Makefile.  This commit adds it.

Fixes: 72b0132 ("api: add transaction support to the libseccomp API")
Fixes: Github Issue #463
Signed-off-by: Tom Hromatka <tom.hromatka@oracle.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

Author: drakenclimber

doc/Makefile.am

@@ -51,6 +51,7 @@ dist_man3_MANS = \
 	man/man3/seccomp_syscall_resolve_name_arch.3 \
 	man/man3/seccomp_syscall_resolve_name_rewrite.3 \
 	man/man3/seccomp_syscall_resolve_num_arch.3 \
+	man/man3/seccomp_transaction_start.3 \
 	man/man3/seccomp_version.3 \
 	man/man3/seccomp_api_get.3 \
 	man/man3/seccomp_api_set.3