util/crossgcc/buildgcc: Remove quotation marks around hashes

They were not originally printed, and serve no good purpose, so let's
remove them again.

Change-Id: I4e00477f2e143f93fd27ba6a083977a667a3eb48
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-on: https://review.coreboot.org/c/28829
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

util/crossgcc/buildgcc

@@ -431,7 +431,7 @@ verify_hash() {
 		exit 1
 	fi
 
-	printf "${GREEN}hash verified (\"$known_hash\")${NC}\n"
+	printf "${GREEN}hash verified (${known_hash})${NC}\n"
 }
 
 unpack_and_patch() {