localmodconfig: Fix parsing of Kconfig "source" statements

The parameter of Kconfig "source" statements does not need to be quoted.
The current regex causes many kconfig files to be skipped and hence,
dependencies to be missed.

Also fix the whitespace repeat count.

Link: http://lkml.kernel.org/r/1459619722-13695-1-git-send-email-bpoirier@suse.com

Tested-by: Lee, Chun-Yi <jlee@suse.com>
Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

scripts/kconfig/streamline_config.pl

@@ -188,7 +188,7 @@ sub read_kconfig {
 	$cont = 0;
 
 	# collect any Kconfig sources
-	if (/^source\s*"(.*)"/) {
+	if (/^source\s+"?([^"]+)/) {
 	    my $kconfig = $1;
 	    # prevent reading twice.
 	    if (!defined($read_kconfigs{$kconfig})) {