`util/analyze_bssl_speed.go`: also parse lines for "1 byte".

Previously the regex expected the plural.

Bug: 383343306
Change-Id: Ib8d916839b51d91674dd30fbc06c9457bcc39d8d
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/84527
Reviewed-by: Adam Langley <agl@google.com>
Auto-Submit: Rudolf Polzer <rpolzer@google.com>
Commit-Queue: Adam Langley <agl@google.com>

util/analyze_bssl_speed.go

diff --git a/util/analyze_bssl_speed.go b/util/analyze_bssl_speed.go
index 9a967d6..4fdd8b2 100644
--- a/util/analyze_bssl_speed.go
+++ b/util/analyze_bssl_speed.go
@@ -45,7 +45,7 @@
 
 type groupedBenchmarks map[string]benchmarkGroup
 
-var removeRE = regexp.MustCompile(` \(\d+ bytes\)`)
+var removeRE = regexp.MustCompile(` \(\d+ bytes?\)`)
 
 func (b benchmarks) group() groupedBenchmarks {
 	g := groupedBenchmarks{}