coin: Preserve quoted arguments when calling cmake / configure

Previously we used sh $* for passing parameters of various calls like
cmake / configure. This did not properly preserve quoted arguments,
leading to potential issues.

For example when configuring qtbase with

 cmake -DQT_QMAKE_DEVICE_OPTIONS="DISTRO_OPTS=hard-float boot2qt"

the 'boot2qt' option would be passed as a separate argument to cmake,
leading to the QT_QMAKE_DEVICE_OPTIONS cache var containing only
'DISTRO_OPTS=hard-float'.

Use "$@" to preserve the quotes.

Inspired by
https://wiki.bash-hackers.org/scripting/posparams#all_positional_parameters

Amends e9b8837c31041326a0e4d66eed6775d385913915

Pick-to: 6.2 6.3
Change-Id: Ib67d4bc138c65f7430457cb2a2baa55bff72e549
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>

coin/instructions/prepare_building_env.yaml

@@ -265,7 +265,7 @@ instructions:
     instructions:
     # Need to unset QMAKESPEC, so that the pre-installed boot2qt mkspec is not picked up.
     - type: WriteFile
-      fileContents: "#!/bin/bash\nunset LD_LIBRARY_PATH\n. {{.Env.QT_YOCTO_ENVSETUP}}\nexport PATH={{.Env.QT_CMAKE_DIR}}:$PATH;\nunset QMAKESPEC\n$*"
+      fileContents: "#!/bin/bash\nunset LD_LIBRARY_PATH\n. {{.Env.QT_YOCTO_ENVSETUP}}\nexport PATH={{.Env.QT_CMAKE_DIR}}:$PATH;\nunset QMAKESPEC\n\"$@\""
       filename: "{{.Env.HOME}}/prefix.sh"
       fileMode: 493
       maxTimeInSeconds: 20