.travis.yml: make package pulls conditional.

Reviewed-by: NRichard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2292)

.travis.yml

@@ -10,15 +10,7 @@ addons:
     apt:
         packages:
             - ccache
-            - clang-3.6
-            - gcc-5
-            - g++-5
             - golang
-            - binutils-mingw-w64
-            - gcc-mingw-w64
-        sources:
-            - llvm-toolchain-precise-3.6
-            - ubuntu-toolchain-r-test
 
 os:
     - linux
@@ -38,33 +30,99 @@ env:
 matrix:
     include:
         - os: linux
+          addons:
+              apt:
+                  packages:
+                      - clang-3.6
+                  sources:
+                      - llvm-toolchain-precise-3.6
+                      - ubuntu-toolchain-r-test
           compiler: clang-3.6
           env: CONFIG_OPTS="--strict-warnings no-deprecated" BUILDONLY="yes"
         - os: linux
+          addons:
+              apt:
+                  packages:
+                      - gcc-5
+                      - g++-5
+                  sources:
+                      - ubuntu-toolchain-r-test
           compiler: gcc-5
           env: CONFIG_OPTS="--debug --coverage no-asm enable-rc5 enable-md2 enable-ec_nistp_64_gcc_128 enable-ssl3 enable-ssl3-method enable-nextprotoneg enable-weak-ssl-ciphers enable-external-tests no-shared -DPEDANTIC -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION" COVERALLS="yes" BORINGSSL_TESTS="yes" CXX="g++-5"
         - os: linux
+          addons:
+              apt:
+                  packages:
+                      - clang-3.6
+                  sources:
+                      - llvm-toolchain-precise-3.6
+                      - ubuntu-toolchain-r-test
           compiler: clang-3.6
           env: CONFIG_OPTS="enable-msan"
         - os: linux
+          addons:
+              apt:
+                  packages:
+                      - clang-3.6
+                  sources:
+                      - llvm-toolchain-precise-3.6
+                      - ubuntu-toolchain-r-test
           compiler: clang-3.6
           env: CONFIG_OPTS="no-asm enable-ubsan enable-rc5 enable-md2 enable-ssl3 enable-ssl3-method enable-nextprotoneg -fno-sanitize=alignment no-shared -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION"
         - os: linux
+          addons:
+              apt:
+                  packages:
+                      - clang-3.6
+                  sources:
+                      - llvm-toolchain-precise-3.6
+                      - ubuntu-toolchain-r-test
           compiler: clang-3.6
           env: CONFIG_OPTS="no-asm enable-asan enable-rc5 enable-md2 no-shared -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION"
         - os: linux
+          addons:
+              apt:
+                  packages:
+                      - gcc-5
+                      - g++-5
+                  sources:
+                      - ubuntu-toolchain-r-test
           compiler: gcc-5
           env: CONFIG_OPTS="no-asm enable-ubsan enable-rc5 enable-md2 -DPEDANTIC"
         - os: linux
+          addons:
+              apt:
+                  packages:
+                      - gcc-5
+                      - g++-5
+                  sources:
+                      - ubuntu-toolchain-r-test
           compiler: gcc-5
           env: CONFIG_OPTS="--strict-warnings enable-tls1_3" COMMENT="Move to the BORINGTEST build when interoperable"
         - os: linux
+          addons:
+              apt:
+                  packages:
+                      - binutils-mingw-w64
+                      - gcc-mingw-w64
           compiler: i686-w64-mingw32-gcc
           env: CONFIG_OPTS="no-stdio" BUILDONLY="yes"
         - os: linux
+          addons:
+              apt:
+                  packages:
+                      - binutils-mingw-w64
+                      - gcc-mingw-w64
+                      - wine
           compiler: i686-w64-mingw32-gcc
           env: CONFIG_OPTS="no-pic"
         - os: linux
+          addons:
+              apt:
+                  packages:
+                      - binutils-mingw-w64
+                      - gcc-mingw-w64
+                      - wine
           compiler: x86_64-w64-mingw32-gcc
           env: CONFIG_OPTS="no-pic"
     exclude:
@@ -116,7 +174,6 @@ script:
     - $make
     - if [ -z "$BUILDONLY" ]; then
           if [ -n "$CROSS_COMPILE" ]; then
-              sudo apt-get -yq --no-install-suggests --no-install-recommends --force-yes install wine;
               export EXE_SHELL="wine" WINEPREFIX=`pwd`;
           fi;
           HARNESS_VERBOSE=yes BORING_RUNNER_DIR=$top/boringssl/ssl/test/runner make test;