add build script

build.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+# cmake -DCMAKE_TOOLCHAIN_FILE=./conf/toolchain.cmake  \
+# -DCMAKE_INSTALL_PREFIX=/home/xuqiang/633/spdlog/build/install \
+# -B build -S .
+
+cmake -B build -S . && cmake --build build