[deb] clang build

Signed-off-by: R4SAS <r4sas@i2pmail.org>

debian/control

@@ -2,7 +2,7 @@ Source: i2pd
 Section: net
 Priority: optional
 Maintainer: r4sas <r4sas@i2pmail.org>
-Build-Depends: debhelper (>= 12~), cmake, libboost-system-dev (>= 1.46), libboost-date-time-dev (>= 1.46), libboost-filesystem-dev (>= 1.46), libboost-program-options-dev (>= 1.46), libminiupnpc-dev, libssl-dev, zlib1g-dev
+Build-Depends: debhelper (>= 12~), clang, cmake, libboost-system-dev (>= 1.46), libboost-date-time-dev (>= 1.46), libboost-filesystem-dev (>= 1.46), libboost-program-options-dev (>= 1.46), libminiupnpc-dev, libssl-dev, zlib1g-dev
 Standards-Version: 4.3.0
 Homepage: http://i2pd.website/
 Vcs-Git: git://github.com/PurpleI2P/i2pd.git

debian/rules

@@ -7,6 +7,9 @@ include /usr/share/dpkg/architecture.mk
 export DEB_CXXFLAGS_MAINT_APPEND  = -Wall -pedantic
 export DEB_LDFLAGS_MAINT_APPEND =
 
+export CC=clang
+export CXX=clang++
+
 %:
 	dh $@ --buildsystem=cmake