IQA-463: fix Linux wrapper.sh (aka secondlife) gridargs.dat handling.

Previous change to wrapper.sh naively read $(<etc/gridargs.dat) directly into
the viewer binary command line. But gridargs.dat contains quoted args as well
as simple space-separated ones: need bash to scan the file using eval. This
was why the older logic used eval on the entire command line. However, we must
use eval only for gridargs.dat so we don't lose individual quoting on
arguments passed to the secondlife script.

indra/newview/linux_tools/wrapper.sh

@@ -112,11 +112,23 @@ export SAVED_LD_LIBRARY_PATH="${LD_LIBRARY_PATH}"
 
 export LD_LIBRARY_PATH="$PWD/lib:${LD_LIBRARY_PATH}"
 
+# Have to deal specially with gridargs.dat; typical contents look like:
+# --channel "Second Life Developer"  --settings settings_developer.xml
+# Simply embedding $(<etc/gridargs.dat) into a command line treats each of
+# Second, Life and Developer as separate args -- no good. We need bash to
+# process quotes using eval.
+# First read it without scanning, then scan that string. Break quoted words
+# into a bash array. Note that if gridargs.dat is empty, or contains only
+# whitespace, the resulting gridargs array will be empty -- zero entries --
+# therefore "${gridargs[@]}" entirely vanishes from the command line below,
+# just as we want.
+eval gridargs=("$(<etc/gridargs.dat)")
+
 # Run the program.
 # Don't quote $LL_WRAPPER because, if empty, it should simply vanish from the
-# command line. Similar remarks about the contents of gridargs.dat. But DO
-# quote "$@": preserve separate args as individually quoted.
-$LL_WRAPPER bin/do-not-directly-run-secondlife-bin $(<etc/gridargs.dat) "$@"
+# command line. But DO quote "$@": preserve separate args as individually
+# quoted. Similar remarks about the contents of gridargs.
+$LL_WRAPPER bin/do-not-directly-run-secondlife-bin "${gridargs[@]}" "$@"
 LL_RUN_ERR=$?
 
 # Handle any resulting errors