[EFL] Fix inappropriate move semantics use in parseAndRemoveEnvironments function

[EFL] Fix inappropriate move semantics use in parseAndRemoveEnvironments function
https://bugs.webkit.org/show_bug.cgi?id=150544

Patch by Joonghun Park <jh718.park@samsung.com> on 2015-11-01
Reviewed by Darin Adler.

In parseAndRemoveEnvironments function, it declares its paramerter type as rvalue.
But in ProcessLauncher::launchProcess(), the argument of
parseAndRemoveEnvironments still be used after the call of the function.
Currently the rvalue is not assigned to any other variable in parseAndRemoveEnvironments,
so it doesn't lead to runtime error but use of move semantic
is not appropriate semantically in this case.

* UIProcess/Launcher/efl/ProcessLauncherEfl.cpp:
(WebKit::parseAndRemoveEnvironments):
(WebKit::ProcessLauncher::launchProcess):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@191868 268f45cc-cd09-0410-ab3c-d52691b4dbfc