Fix another instance of potentially dangling ":" in LD_LIBRARY_PATH.

chrome/tools/build/linux/chrome-wrapper

Index: chrome/tools/build/linux/chrome-wrapper
diff --git a/chrome/tools/build/linux/chrome-wrapper b/chrome/tools/build/linux/chrome-wrapper
index 090891fad6fcedc97f38c31853e2a8953e38d378..ba1187233edddfc241dd1f93ac20b38ecbdf5a17 100755
--- a/chrome/tools/build/linux/chrome-wrapper
+++ b/chrome/tools/build/linux/chrome-wrapper
@@ -81,7 +81,13 @@ case ":$PATH:" in
 esac
 
 # Always use our ffmpeg and other shared libs.
-export LD_LIBRARY_PATH="$HERE:$HERE/lib:$HERE/lib.target:$LD_LIBRARY_PATH"
+if [[ -n "$LD_LIBRARY_PATH" ]]; then
+  LD_LIBRARY_PATH="$HERE:$HERE/lib:$HERE/lib.target:$LD_LIBRARY_PATH"
+else
+  LD_LIBRARY_PATH="$HERE:$HERE/lib:$HERE/lib.target"
+fi
+export LD_LIBRARY_PATH
+
 
 MISSING_LIBS=$(ldd "$HERE/chrome" 2> /dev/null |grep "not found$" | cut -d" " -f 1|sed 's/\t//')
 CHROME_ARCH=$(check_executable "$HERE/chrome")