Make test runners support execution runtimes (#2360)

If the result of a build is not directly executable on the host
system or needs an execution runtime for any other reason (e.g.,
cross-compiled ARM binaries on Intel, emscripten-generated JS
files, binaries built with Valgrind support) then the current test
runners cannot work with them. This patch makes test runners
execute binaries via a runtime given in the `$RUNTIME` environment
variable (if it is specified).

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu

.travis.yml

@@ -38,8 +38,8 @@ matrix:
     - env:
         - JOBNAME="Linux/ARM Build & Correctness Tests"
         - OPTS="--quiet --jerry-tests --jerry-test-suite --toolchain=cmake/toolchain_linux_armv7l.cmake"
+        - RUNTIME=qemu-arm-static
         - TIMEOUT=300
-      sudo: true # keep on sudo-enabled VM to allow qemu to register itself to binfmt_misc
       addons:
         apt:
           packages: [gcc-arm-linux-gnueabihf, libc6-dev-armhf-cross, qemu-user-static]