build: 获取编译打包实际时间

https://www.debian.org/doc/manuals/debmake-doc/ch05.en.html#reproducible
修改 debian/rules，覆盖环境变量 SOURCE_DATE_EPOCH 为 $(date +%s)，使关于窗口中版本号显示编译时间为实际编译时间，而不是 changelog 最新时间（将导致相同版本代码每次编译结果不同，不推荐）

Log: 修改 debian/rules：覆盖环境变量 SOURCE_DATE_EPOCH 为 $(date +%s)；修改 qmake 参数为 CONFIG+=force_debug_info 以生成 dbgsym 包；编译生成临时文件夹名称添加架构后缀

debian/rules

@@ -3,10 +3,13 @@
 export QT_SELECT = qt5
 export DEB_BUILD_MAINT_OPTIONS = hardening=+all
 include /usr/share/dpkg/default.mk
-export DEB_VERSION = $(shell dpkg-parsechangelog -S Version)
+
 DEB_BUILD_ARCH ?= $(shell dpkg-architecture -qDEB_BUILD_ARCH)
 DEB_HOST_MULTIARCH ?= $(shell dpkg-architecture -qDEB_HOST_MULTIARCH)
 
+# Use realtime timestamp instead of the latest entry in debian/changelog
+SOURCE_DATE_EPOCH := $(shell date +%s)
+
 # Uncomment this to turn on verbose mode.
 #export DH_VERBOSE = 1
 
@@ -14,25 +17,23 @@ DEB_HOST_MULTIARCH ?= $(shell dpkg-architecture -qDEB_HOST_MULTIARCH)
 	dh $@ --parallel
 
 override_dh_auto_clean:
-	rm -rf $(CURDIR)/build
+	rm -rf $(CURDIR)/build-$(DEB_HOST_MULTIARCH)
 
 override_dh_auto_configure:
-	mkdir -p $(CURDIR)/build
+	mkdir -p $(CURDIR)/build-$(DEB_HOST_MULTIARCH)
 
 	qmake BUILD_VERSION=$(DEB_VERSION_UPSTREAM) spark-store-project.pro \
-	-spec linux-g++ CONFIG+=qtquickcompiler \
-	-o $(CURDIR)/build/
+	-spec linux-g++ CONFIG+=force_debug_info \
+	-o $(CURDIR)/build-$(DEB_HOST_MULTIARCH)/
 
 override_dh_auto_build:
-	make MAKEFLAGS="$(MAKEFLAGS)" -C $(CURDIR)/build 
+	make -C $(CURDIR)/build-$(DEB_HOST_MULTIARCH) -j$(JOBS)
 
 override_dh_auto_install:
-	make -C $(CURDIR)/build install \
+	make -C $(CURDIR)/build-$(DEB_HOST_MULTIARCH) install \
 	INSTALL_ROOT=$(CURDIR)/debian/spark-store
 
-
 # Ignore the dpkg-shlibdeps: warning (it uses none of the library's symbols)
 # Qt Mutidedia lib will ref to network libraray.
 override_dh_shlibdeps:
 	dh_shlibdeps --dpkg-shlibdeps-params=--warnings=0
-