Tolerate spaces when parsing .type directives.

The .type foo, @abi-omnipotent lines weren't being parsed correctly.
This doesn't change the generated files, but some internal state (used
in-progress work on perlasm SEH directives) wasn't quite right.

Change-Id: Id6aec79281a59f45b2eb2aea9f1fb8806b4c483e
Reviewed-on: https://boringssl-review.googlesource.com/c/34786
Reviewed-by: Adam Langley <agl@google.com>

crypto/perlasm/x86_64-xlate.pl

diff --git a/crypto/perlasm/x86_64-xlate.pl b/crypto/perlasm/x86_64-xlate.pl
index 78832fc..74fb32f 100755
--- a/crypto/perlasm/x86_64-xlate.pl
+++ b/crypto/perlasm/x86_64-xlate.pl
@@ -732,7 +732,7 @@
 				    $$line = $globals{$$line} if ($prefix);
 				    last;
 				  };
-		/\.type/    && do { my ($sym,$type,$narg) = split(',',$$line);
+		/\.type/    && do { my ($sym,$type,$narg) = split(/\s*,\s*/,$$line);
 				    if ($type eq "\@function") {
 					undef $current_function;
 					$current_function->{name} = $sym;