lib: Gate libfigpar under MK_DIALOG

libfigpar is only used by dpv and dpv isn't built if WITHOUT_DIALOG
is set.

lib/Makefile

@@ -57,7 +57,6 @@ SUBDIR=	${SUBDIR_BOOTSTRAP} \
 	libexecinfo \
 	libexpat \
 	libfetch \
-	libfigpar \
 	libgcc_eh \
 	libgcc_s \
 	libgeom \
@@ -170,7 +169,7 @@ SUBDIR+=	clang
 SUBDIR.${MK_CUSE}+= 	libcuse
 SUBDIR.${MK_CXX}+=	libdevdctl
 SUBDIR.${MK_TOOLCHAIN}+=libpe
-SUBDIR.${MK_DIALOG}+=	libdpv
+SUBDIR.${MK_DIALOG}+=	libdpv libfigpar
 SUBDIR.${MK_FILE}+=	libmagic
 SUBDIR.${MK_GPIO}+=	libgpio
 SUBDIR.${MK_GSSAPI}+=	libgssapi librpcsec_gss