Fix error in /etc/profile when run from a non-tty

The tty command can return "not a tty" and thus contain spaces. The test
command invocation in /etc/profile did not take this into account.

This led to an error message
"/etc/profile: line 34: test: too many arguments" when running a process
with Qt Creator RemoteLinux plugin.

Change-Id: I892f8ed47a95f41977b7ef49f42c5c3a41cdf848
Reviewed-by: Mikko Gronoff <mikko.gronoff@qt.io>
Reviewed-by: Samuli Piippo <samuli.piippo@qt.io>

recipes/base-files/base-files_3.0.14.bbappend

@@ -38,4 +38,7 @@ do_install_append() {
 
     install -m 0755 -d ${D}${sysconfdir}/modprobe.d
     install -m 0644 ${WORKDIR}/blacklist.conf ${D}${sysconfdir}/modprobe.d
+
+    # Add quotes around command expansion, since tty may return "not a tty"
+    sed -i 's#test `tty | cut -c1-8`#test "`tty | cut -c1-8`"#' ${D}${sysconfdir}/profile
 }