install lua symlinks to $(PREFIX)/$(BUILD)/bin

... instead of $(PREFIX)/bin, not to clobber the user's normal
tools.

See #1017

plugins/luarocks/luarocks.mk

@@ -24,7 +24,7 @@ define $(PKG)_BUILD_SHARED
         --rocks-tree='$(PREFIX)/$(TARGET)' \
         --lua-version='$(lua_SHORTVER)' \
         --with-lua='$(PREFIX)/$(TARGET)' \
-        --with-lua-bin='$(PREFIX)/bin' \
+        --with-lua-bin='$(PREFIX)/$(BUILD)/bin' \
         --with-downloader='wget' \
         --with-md5-checker='openssl'
     $(MAKE) -C '$(1)' build \

src/lua.mk

@@ -81,7 +81,7 @@ define $(PKG)_BUILD_$(BUILD)
     $(MAKE) -C '$(1)/src' -j '$(JOBS)' \
         PLAT=$(shell ([ `uname -s` == Darwin ] && echo "macosx") || echo `uname -s` | tr '[:upper:]' '[:lower:]')
     $(INSTALL) '$(1)/src/lua' '$(PREFIX)/bin/$(BUILD)-lua'
-    ln -sf '$(BUILD)-lua' '$(PREFIX)/bin/lua'
+    ln -sf '$(PREFIX)/bin/$(BUILD)-lua' '$(PREFIX)/$(BUILD)/bin/lua'
     $(INSTALL) '$(1)/src/luac' '$(PREFIX)/bin/$(BUILD)-luac'
-    ln -sf '$(BUILD)-luac' '$(PREFIX)/bin/luac'
+    ln -sf '$(PREFIX)/bin/$(BUILD)-luac' '$(PREFIX)/$(BUILD)/bin/luac'
 endef