Makefile: add native-gcc rule

Makefile

@@ -38,7 +38,7 @@ built/wasm32: | built
 	$(MKDIR) $@
 test/wasm32: | test
 	$(MKDIR) $@
-build/wasm32/binutils-gdb build/wasm32/gcc-preliminary build/wasm32/gdb build/wasm32/glibc build/wasm32/gcc build/wasm32/gcc-testsuite build/wasm32/gcc-testsuite-tar build/wasm32/gcc-testsuite-make build/wasm32/ncurses build/wasm32/bash build/wasm32/python build/wasm32/native-binutils build/wasm32/gmp: | build/wasm32
+build/wasm32/binutils-gdb build/wasm32/gcc-preliminary build/wasm32/gdb build/wasm32/glibc build/wasm32/gcc build/wasm32/gcc-testsuite build/wasm32/gcc-testsuite-tar build/wasm32/gcc-testsuite-make build/wasm32/ncurses build/wasm32/bash build/wasm32/python build/wasm32/native-binutils build/wasm32/gmp build/wasm32/native-gcc: | build/wasm32
 	$(MKDIR) $@
 build/common/binaryen build/common/wabt build/common/python: | build/common
 	$(MKDIR) $@
@@ -701,6 +701,7 @@ built/wasm32/gcc-preliminary: | install/texinfo-bison-flex
 built/wasm32/gcc: | install/texinfo-bison-flex
 built/wasm32/binutils-gdb: | install/texinfo-bison-flex
 built/wasm32/native-binutils: | install/texinfo-bison-flex
+built/wasm32/native-gcc: | install/texinfo-bison-flex
 built/wasm32/glibc: | install/texinfo-bison-flex
 built/wasm32/ncurses: | install/texinfo-bison-flex
 built/wasm32/bash: | install/texinfo-bison-flex
@@ -714,6 +715,7 @@ built/wasm32/gcc-preliminary: | install/gcc-dependencies
 built/wasm32/gcc: | install/gcc-dependencies
 built/wasm32/binutils-gdb: | install/gcc-dependencies
 built/wasm32/native-binutils: | install/gcc-dependencies
+built/wasm32/native-gcc: | install/gcc-dependencies
 built/wasm32/glibc: | install/gcc-dependencies
 built/wasm32/ncurses: | install/gcc-dependencies
 built/wasm32/bash: | install/gcc-dependencies