fix(fiptool): respect OPENSSL_DIR

fiptool links to libcrypto, so as with the other tools it should respect
OPENSSL_DIR for include/library paths.

Change-Id: Icd8c15fa5097db1da9a3a9222d9e267548c4c7e2
Signed-off-by: Ross Burton <ross.burton@arm.com>
diff --git a/tools/fiptool/Makefile b/tools/fiptool/Makefile
index 11d2e7b..7c2a083 100644
--- a/tools/fiptool/Makefile
+++ b/tools/fiptool/Makefile
@@ -12,6 +12,8 @@
 PROJECT := $(notdir ${FIPTOOL})
 OBJECTS := fiptool.o tbbr_config.o
 V ?= 0
+OPENSSL_DIR := /usr
+
 
 override CPPFLAGS += -D_GNU_SOURCE -D_XOPEN_SOURCE=700
 HOSTCCFLAGS := -Wall -Werror -pedantic -std=c99
@@ -20,7 +22,7 @@
 else
   HOSTCCFLAGS += -O2
 endif
-LDLIBS := -lcrypto
+LDLIBS := -L${OPENSSL_DIR}/lib -lcrypto
 
 ifeq (${V},0)
   Q := @
@@ -28,7 +30,7 @@
   Q :=
 endif
 
-INCLUDE_PATHS := -I../../include/tools_share
+INCLUDE_PATHS := -I../../include/tools_share  -I${OPENSSL_DIR}/include
 
 HOSTCC ?= gcc