lprng: Specify target paths for needed utilities

pr,openssl,chown,chgrp are guessed during configure and they are
found on host, sometimes under native sysroot and some under HOSTTOOLS
which is not right, therefore point to target locations of these tools

Fixes all errors like below

File /usr/sbin/lprng_certs in package lprng contains reference to TMPDIR

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Armin Kuster <akuster@mvista.com>

meta-oe/recipes-extended/lprng/lprng_3.8.C.bb

@@ -11,7 +11,9 @@ SRC_URI[sha256sum] = "694a1747a96385b89e93f43343bf35cee5c8c73353a83814106911c99f
 
 inherit autotools gettext
 
-EXTRA_OECONF = "--disable-ssl --disable-kerberos --enable-force_localhost"
+EXTRA_OECONF = "--disable-ssl --disable-kerberos --enable-force_localhost \
+				CHOWN=${base_bindir}/chown CHGRP=${base_bindir}/chgrp \
+				OPENSSL=${bindir}/openssl PRUTIL=${bindir}/pr"
 FILES:${PN}-dbg += "${libdir}/lprng/filters/.debug"
 
 # configure: WARNING: Program 'clear' is not found. Set environment CLEAR=no if you do not want to use it