Add BTI enablement in TS

Add BTI_ENABLED option which enables bti in the sp,
opteesp and arm-linux environments.

Signed-off-by: Gabor Toth <gabor.toth2@arm.com>
Change-Id: I2ed477f52000839c61d4f0631c5fd19465c5b7a3
diff --git a/external/t_cose/t_cose-init-cache.cmake.in b/external/t_cose/t_cose-init-cache.cmake.in
index abd3eba..1068409 100644
--- a/external/t_cose/t_cose-init-cache.cmake.in
+++ b/external/t_cose/t_cose-init-cache.cmake.in
@@ -7,6 +7,7 @@
 
 set(CMAKE_INSTALL_PREFIX "@BUILD_INSTALL_DIR@" CACHE STRING "")
 set(CMAKE_TOOLCHAIN_FILE "@TS_EXTERNAL_LIB_TOOLCHAIN_FILE@" CACHE STRING "")
+set(BTI_ENABLED @BTI_ENABLED@ CACHE BOOL "")
 
 set(MBEDTLS On CACHE STRING "")