Removed custom build script and finalized libnx Makefile

Makefile.libnx

@@ -7,6 +7,6 @@ fetch:
 	@./libretro-fetch.sh $(echo "retroarch"; grep -Eo '^[^ ]+' ./recipes/nintendo/libnx)
 
 build:
-	@./libretro-build-libnx.sh
+	@platform=libnx ./libretro-build.sh $(grep -Eo '^[^ ]+' ./recipes/nintendo/libnx)
 
 .PHONY: default

libretro-build-libnx.sh

@@ -1,24 +0,0 @@
-#! /usr/bin/env bash
-# vim: set ts=3 sw=3 noet ft=sh : bash
-
-SCRIPT="${0#./}"
-BASE_DIR="${SCRIPT%/*}"
-WORKDIR="$PWD"
-
-if [ "$BASE_DIR" = "$SCRIPT" ]; then
-	BASE_DIR="$WORKDIR"
-else
-	if [[ "$0" != /* ]]; then
-		# Make the path absolute
-		BASE_DIR="$WORKDIR/$BASE_DIR"
-	fi
-fi
-
-if [[ -z "$1" ]]; then
-WANT_CORES=$(grep -Eo '^[^ ]+' ${BASE_DIR}/recipes/nintendo/libnx)
-
-else
-WANT_CORES="$@"
-fi
-
-platform=libnx ${BASE_DIR}/libretro-build.sh ${WANT_CORES}