man: use ${sysconfdir} instead of /etc for packaging

It is considered good practice to use the build system provided
variables instead of directly specify hardcoded paths.

(From OE-Core rev: e044be34601dcc8eeca7f96d628964bebf562e2e)

Signed-off-by: Javier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/man/man_1.6f.bb

@@ -3,7 +3,7 @@ DESCRIPTION = "A set of documentation tools: man, apropos and whatis"
 SECTION = "console/utils"
 HOMEPAGE = "http://primates.ximian.com/~flucifredi/man"
 LICENSE = "GPLv2"
-PR = "r2"
+PR = "r3"
 
 DEPENDS = "groff less"
 
@@ -51,10 +51,10 @@ fakeroot do_install() {
 }
 
 do_install_append(){
-	mkdir -p  ${D}/etc/
+	mkdir -p  ${D}${sysconfdir}
         mkdir -p ${D}${datadir}/man/man5
         mkdir -p ${D}${datadir}/man/man7
-	cp ${S}/src/man.conf ${D}/etc/
+	cp ${S}/src/man.conf ${D}${sysconfdir}
         cp ${WORKDIR}/man.1.gz ${D}${datadir}/man/man1/
         cp ${WORKDIR}/man.7.gz ${D}${datadir}/man/man7/
         cp ${WORKDIR}/manpath.5.gz ${D}${datadir}/man/man5/