Attempt to properly fix parallel (-jX) build of `mail/fdm' by adding

missing dependency of `lex.c' on later-generated `parse.h' (no other
file wants to include it).

Silence from:	dinoex (since 23 Jun)

mail/fdm/Makefile

@@ -13,8 +13,6 @@ LICENSE=	ISCL
 
 LIB_DEPENDS=	libtdb.so:databases/tdb
 
-MAKE_JOBS_UNSAFE=	yes
-
 USE_GITHUB=	yes
 GH_ACCOUNT=	nicm
 USES=		autoreconf:build ssl
@@ -34,6 +32,7 @@ PCRE_LIB_DEPENDS=libpcre.so:devel/pcre
 
 post-patch:
 	@${REINPLACE_CMD} -e 's|/etc|${PREFIX}/etc|g' ${WRKSRC}/*.[15] ${WRKSRC}/MANUAL
+	@${ECHO_CMD} 'lex.c: parse.h' >> ${WRKSRC}/Makefile.am
 
 pre-configure:
 	@cd ${WRKSRC} && sh autogen.sh