Allow re-targeting of naclports install

libraries/libtheora-1.1.1/nacl-libtheora-1.1.1.sh

Index: libraries/libtheora-1.1.1/nacl-libtheora-1.1.1.sh
diff --git a/libraries/libtheora-1.1.1/nacl-libtheora-1.1.1.sh b/libraries/libtheora-1.1.1/nacl-libtheora-1.1.1.sh
index 76d300c318938ab11612ff0f1e19ac8443432925..a972066b92333b203d716951f1807a3e29690eb1 100755
--- a/libraries/libtheora-1.1.1/nacl-libtheora-1.1.1.sh
+++ b/libraries/libtheora-1.1.1/nacl-libtheora-1.1.1.sh
@@ -21,8 +21,8 @@ CustomConfigureStep() {
   export CXX=${NACLCXX}
   export AR=${NACLAR}
   export RANLIB=${NACLRANLIB}
-  export PKG_CONFIG_PATH=${NACL_SDK_USR_LIB}/pkgconfig
-  export PKG_CONFIG_LIBDIR=${NACL_SDK_USR_LIB}
+  export PKG_CONFIG_PATH=${NACLPORTS_LIBDIR}/pkgconfig
+  export PKG_CONFIG_LIBDIR=${NACLPORTS_LIBDIR}
   export PATH=${NACL_BIN_PATH}:${PATH};
   # Turn off doxygen (it doesn't exist on Mac & Linux, and has an error on
   # Windows).
@@ -34,10 +34,10 @@ CustomConfigureStep() {
   ../configure \
     --host=nacl \
     --disable-shared \
-    --prefix=${NACL_SDK_USR} \
-    --exec-prefix=${NACL_SDK_USR} \
-    --libdir=${NACL_SDK_USR_LIB} \
-    --oldincludedir=${NACL_SDK_USR_INCLUDE} \
+    --prefix=${NACLPORTS_PREFIX} \
+    --exec-prefix=${NACLPORTS_PREFIX} \
+    --libdir=${NACLPORTS_LIBDIR} \
+    --oldincludedir=${NACLPORTS_INCLUDE} \
     --disable-examples \
     --disable-sdltest \
     --with-http=off \