Enable more compiler warnings in tests/Makefile
tests/Makefile had some unused warnings disabled unnecessarily, which
test-ref-configs.pl was turning back on. We don't need to disable these warnings
so I'm turning them back on.
# To compile with PKCS11: add "-lpkcs11-helper" to LDFLAGS
CFLAGS ?= -O2
-WARNING_CFLAGS ?= -Wall -W -Wdeclaration-after-statement -Wno-unused-function -Wno-unused-value
+WARNING_CFLAGS ?= -Wall -W -Wdeclaration-after-statement -Wunused
LDFLAGS ?=
LOCAL_CFLAGS = $(WARNING_CFLAGS) -I../include -D_FILE_OFFSET_BITS=64
