build: set DESTCPU correctly for 'make binary' on loongarch64 · nodejs/node@4831b87

Original file line number	Diff line number	Diff line change
`@@ -934,6 +934,9 @@ else`
`934`	`934`	`ifeq ($(findstring riscv64,$(UNAME_M)),riscv64)`
`935`	`935`	`DESTCPU ?= riscv64`
`936`	`936`	`else`
	`937`	`+ifeq ($(findstring loongarch64,$(UNAME_M)),loongarch64)`
	`938`	`+DESTCPU ?= loong64`
	`939`	`+else`
`937`	`940`	`DESTCPU ?= x86`
`938`	`941`	`endif`
`939`	`942`	`endif`
`@@ -947,6 +950,7 @@ endif`
`947`	`950`	`endif`
`948`	`951`	`endif`
`949`	`952`	`endif`
	`953`	`+endif`
`950`	`954`	`ifeq ($(DESTCPU),x64)`
`951`	`955`	`ARCH=x64`
`952`	`956`	`else`
`@@ -971,6 +975,9 @@ else`
`971`	`975`	`ifeq ($(DESTCPU),riscv64)`
`972`	`976`	`ARCH=riscv64`
`973`	`977`	`else`
	`978`	`+ifeq ($(DESTCPU),loong64)`
	`979`	`+ARCH=loong64`
	`980`	`+else`
`974`	`981`	`ARCH=x86`
`975`	`982`	`endif`
`976`	`983`	`endif`
`@@ -980,6 +987,7 @@ endif`
`980`	`987`	`endif`
`981`	`988`	`endif`
`982`	`989`	`endif`
	`990`	`+endif`
`983`	`991`
`984`	`992`	`# node and v8 use different arch names (e.g. node 'x86' vs v8 'ia32').`
`985`	`993`	`# pass the proper v8 arch name to $V8_ARCH based on user-specified $DESTCPU.`