libpam: Provide needed env for tst-pam_start_confdir ptest

tst-pam_start_confdir needs a file called confdir and it should reside
in directory pointed by srcdir env variable, therefore copy confdir into
ptest package and export srcdir before running the ptests

(From OE-Core rev: 149d84b7eba8240737a301d0fd75b69e8a767854)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/pam/libpam/run-ptest

@@ -2,9 +2,10 @@
 
 cd tests
 
+export srcdir=.
+
 failed=0
 all=0
-
 for f in tst-*; do
     "./$f" > /dev/null 2>&1
     case "$?" in
@@ -28,4 +29,4 @@ if [ "$failed" -eq 0 ] ; then
 else
   echo "$failed of $all tests failed"
 fi
-
+unset srcdir

meta/recipes-extended/pam/libpam_1.5.1.bb

@@ -154,6 +154,7 @@ do_install_ptest() {
     if [ ${PTEST_ENABLED} = "1" ]; then
         mkdir -p ${D}${PTEST_PATH}/tests
         install -m 0755 ${B}/tests/.libs/* ${D}${PTEST_PATH}/tests
+        install -m 0644 ${S}/tests/confdir ${D}${PTEST_PATH}/tests
     fi
 }