Added missing 'make install' commands to .travis.yml.

.travis.yml

@@ -1,22 +1,24 @@
 language: c
 
 before_script:
-  - _libsodium_version=0.4.5
     # install libsodium (needed for libtoxcore)
+  - _libsodium_version=0.4.5
   - git clone git://github.com/jedisct1/libsodium.git > /dev/null
   - pushd libsodium
   - git checkout tags/${_libsodium_version} > /dev/null
   - ./autogen.sh > /dev/null
   - ./configure --prefix=/usr > /dev/null
   - make -j3 > /dev/null
+  - sudo make install > /dev/null
   - popd
 
     # install toxcore
   - git clone git://github.com/irungentoo/toxcore > /dev/null
   - pushd toxcore
   - autoreconf -i > /dev/null
-  - ./configure --prefix=/usr --disable-testing --disable-ntox
+  - ./configure --prefix=/usr --disable-testing --disable-ntox > /dev/null
   - make -j3 > /dev/null
+  - sudo make install > /dev/null
   - popd
 
 script: cmake . && make -j3