Re-add libboost1.71-dev as a dependency, since the Buster slave conta…

…iners have that installed instead of just libboost-dev

Signed-off-by: Saikrishna Arcot <sarcot@microsoft.com>

debian/control

@@ -2,7 +2,7 @@ Source: sonic
 Maintainer: Shuotian Cheng <shuche@microsoft.com>
 Section: net
 Priority: optional
-Build-Depends: dh-exec (>=0.3), debhelper (>= 12), autotools-dev, libboost-dev
+Build-Depends: dh-exec (>=0.3), debhelper (>= 12), autotools-dev, libboost-dev | libboost1.71-dev
 Standards-Version: 1.0.0
 
 Package: libswsscommon
@@ -13,7 +13,7 @@ Description: This package contains Switch State Service common library.
 
 Package: libswsscommon-dev
 Architecture: any
-Depends: libswsscommon (= ${binary:Version}), libboost-dev
+Depends: libswsscommon (= ${binary:Version}), libboost-dev | libboost1.71-dev
 Section: libdevel
 Description: This package contains development files for Switch State Service.