Allow re-targeting of naclports install

libraries/openssl-1.0.0e/nacl-openssl-1.0.0e.sh

Index: libraries/openssl-1.0.0e/nacl-openssl-1.0.0e.sh
diff --git a/libraries/openssl-1.0.0e/nacl-openssl-1.0.0e.sh b/libraries/openssl-1.0.0e/nacl-openssl-1.0.0e.sh
index 1caced62494bf2dbc77a43df3f1967e1b06769c1..46980de84a681739f804c91037bcdd92792ae3b9 100755
--- a/libraries/openssl-1.0.0e/nacl-openssl-1.0.0e.sh
+++ b/libraries/openssl-1.0.0e/nacl-openssl-1.0.0e.sh
@@ -19,7 +19,7 @@ CustomConfigureStep() {
   local extra_args=""
   if [[ "${NACL_ARCH}" = "pnacl" ||
         "${NACL_TOOLCHAIN_ROOT}" == *newlib* ]] ; then
-    readonly GLIBC_COMPAT=${NACL_SDK_USR_INCLUDE}/glibc-compat
+    readonly GLIBC_COMPAT=${NACLPORTS_INCLUDE}/glibc-compat
     if [[ ! -f ${GLIBC_COMPAT}/netdb.h ]]; then
       echo "Please install glibc-compat first"
       exit 1
@@ -29,7 +29,7 @@ CustomConfigureStep() {
 
   ChangeDir ${NACL_PACKAGES_REPOSITORY}/${PACKAGE_NAME}
   MACHINE=i686 CC=${NACLCC} AR=${NACLAR} RANLIB=${NACLRANLIB} ./config \
-     --prefix=${NACL_SDK_USR} no-asm no-hw no-krb5 ${extra_args} -D_GNU_SOURCE
+     --prefix=${NACLPORTS_PREFIX} no-asm no-hw no-krb5 ${extra_args} -D_GNU_SOURCE
 }
 
 CustomHackStepForNewlib() {