[linux-pam] build: use $host_cpu for lib64 directory handling [ticket#46]

[kukuk]

commit 4a1867dce6f60c2985271a64b70bc7fb702bbe0a
Author: Thorsten Kukuk <kukuk(a)thkukuk.de&gt;
Date:   Mon Apr 4 11:33:11 2016 +0200

    build: use $host_cpu for lib64 directory handling [ticket#46]
    
    * configure.ac: use $host_cpu for lib64 directory handling.
    
    Signed-off-by: Yousong Zhou <yszhou4tech(a)gmail.com&gt;

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 20f6ba3..739390e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -27,7 +27,7 @@ dnl If we use /usr as prefix, use /etc for config files
         fi
 	if test ${libdir} = '${exec_prefix}/lib'
 	then
-		case "`uname -m`" in
+		case "$host_cpu" in
 		    x86_64|ppc64|s390x|sparc64)
 			libdir="/lib64" ;;
 		    *)