test: Match gccgo error messages.

vareq.go:10:25: error: expected ';' or '}' or newline

vareq1.go:9:24: error: expected ';' or newline after top level declaration

R=rsc
CC=golang-dev
https://golang.org/cl/2132045

test/syntax/vareq.go

@@ -7,4 +7,4 @@
 package main
 
 func main() {
-	var x map[string]string{"a":"b"}		// ERROR "unexpected { at end of statement"
+	var x map[string]string{"a":"b"}		// ERROR "unexpected { at end of statement|expected ';' or '}' or newline"

test/syntax/vareq1.go

@@ -6,5 +6,5 @@
 
 package main
 
-var x map[string]string{"a":"b"}		// ERROR "unexpected { at end of statement"
+var x map[string]string{"a":"b"}		// ERROR "unexpected { at end of statement|expected ';' or newline after top level declaration"