release build, create 3700xxx binaries

.gitignore

@@ -3,3 +3,5 @@ target
 .dir-locals.el
 *~
 *\#
+3700send
+3700recv

Makefile

@@ -1,10 +1,18 @@
 .PHONY: all clean test c t
 
-all: .rustup-installed
+all: .rustup-installed release-build
+
+debug-build:
 	cargo build
 
+release-build:
+	cargo build --release
+	cp ./target/release/hptp-recv ./3700recv
+	cp ./target/release/hptp-send ./3700send
+
 clean:
 	cargo clean
+	rm -f 3700send 3700recv
 
 test:
 	cargo test