fix: Modify the absolute path execution of musl-gcc

Signed-off-by: Super-long <0x4f4f4f4f@gmail.com>

Author: Super-long

Makefile

@@ -123,7 +123,7 @@ cli: ## Build blade cli
 	$(GO) build $(GO_FLAGS) -o $(BUILD_TARGET_PKG_DIR)/blade ./cli
 
 nsexec: ## Build nsexec
-	/usr/local/musl/bin/musl-gcc -static nsexec.c -o $(BUILD_TARGET_PKG_DIR)/bin/nsexec
+	musl-gcc -static nsexec.c -o $(BUILD_TARGET_PKG_DIR)/bin/nsexec
 
 os: ## Build basic resource experimental scenarios.
 ifneq ($(BUILD_TARGET_CACHE)/chaosblade-exec-os, $(wildcard $(BUILD_TARGET_CACHE)/chaosblade-exec-os))