tig: Remove unneeded asciidoc BDEP, simpler fake

Both manpages and manual.html are shipped as is, they are not built.
Since we don't install anything else, further HTML pages need no
building and asciidoc is not required/used.

Using the port's install-doc-man target simplifies things.

Builds and pacakges fine without asciidoc installed, no PLIST change.

OK?

Index: Makefile
===================================================================
RCS file: /cvs/ports/devel/tig/Makefile,v
retrieving revision 1.31
diff -u -p -r1.31 Makefile
--- Makefile 20 Nov 2019 10:26:29 -0000 1.31
+++ Makefile 1 Apr 2020 13:03:09 -0000
@@ -18,30 +18,28 @@ WANTLIB += c curses iconv

MASTER_SITES = https://github.com/jonas/tig/releases/download/tig-$V/

-BUILD_DEPENDS = textproc/asciidoc \
- textproc/xmlto
+BUILD_DEPENDS = textproc/xmlto

RUN_DEPENDS = devel/git

LIB_DEPENDS = converters/libiconv

USE_GMAKE = Yes
-ALL_TARGET = all doc-man doc-html

CONFIGURE_STYLE = gnu
CONFIGURE_ARGS += --with-libiconv=${LOCALBASE} DOCBOOK2PDF=false

MAKE_FLAGS = V=1

-FAKE_FLAGS = sysconfdir=${PREFIX}/share/examples/tig
+FAKE_FLAGS = mandir=${PREFIX}/man \
+ sysconfdir=${PREFIX}/share/examples/tig \
+
+FAKE_TARGET = install install-doc-man

NO_TEST = Yes

post-install:
${INSTALL_DATA_DIR} ${PREFIX}/share/doc/tig
${INSTALL_DATA} ${WRKSRC}/doc/manual.html ${PREFIX}/share/doc/tig
- ${INSTALL_MAN} ${WRKSRC}/doc/tig.1 ${PREFIX}/man/man1
- ${INSTALL_MAN} ${WRKSRC}/doc/tigrc.5 ${PREFIX}/man/man5
- ${INSTALL_MAN} ${WRKSRC}/doc/tigmanual.7 ${PREFIX}/man/man7

.include <bsd.port.mk>